I had a 7 prc when it first came out but moved away from it. I had a question any one running or tried n568 with 190 grain bullet? I used n565 last time but I have a ton of n568. I would prolly increase the freebore if I did do it just for the 190s
I’m sure there is a thread with this info already but figured I’d ask anyways. Anyone have a pet load or two with Peterson brass and 190 bergers, using N570 and or N560?
Alright, another question…. Has anyone seen a measurable difference between virgin brass and fire formed?
There will always be several thou difference between fired and virgin. The case is expanding as you shoot and imprinting against the chambering. Theres a small bit of spring back so it can eject but the case is blowing out from the sized/ virgin state as you shoot
Do you already own these components? If not I strongly suggest - lapua, 180 and h1000
I already own the components. My load now is 66.0gr H1000 federal 215M, Berger 190’s and Peterson brass. Good for .5” groups, but temp sensitive. So got some N560 and N570. I usually fire form my brass first, but for the sake of possibly saving powder,bullets and primers I didn’t know how measurable the fire formed brass results were vs virgin
I love Lapua brass and use it for all my other rifles but I’m finding Peterson is more consistent
I meant adg. I was thinking 300. But if that’s the brass you have and like.
I’d love to say the same as you I went from a 67.2gr load under 3/8” at 70 ish degrees 2850 average to a 67.2gr around 3/4 at 84” and 2950. That was after a few 5rnd groups just to be sure it wasn’t a fluke
I promise that’s not the powder. Is this a new barrel? Less than 250 rounds?
I’m not against the powder I promise, the powder shoots lights out in a few of my rifles. The barrel has between 175 a 225 rounds through it. Which I know it speeds up over the break in. I have two things converging at once, temps outside heating up and barrel break in. But you make a good point maybe I’m over analyzing it
I've seen where h1000 wasnt as temp stable as they claim i didn't have that extreme but did have issues. I moved to n565 and n568 and never had another temp issue. I can shoot my loads in 95 degrees to 15 degrees
I’ve got 3-4k rounds of magnum with h1k and I shoot over chrono everytime. I see about a half a fos per degree that bell curves at 90 and 30.
I promise you did not see 100fps increase from powder in 15 degrees.
That speed difference is from the barrel not the powder. Thats how I knew it was a new barrel
I believe you! I thought it was extremely odd. None of my other sticks have done that to me but they may have had 500+ rounds through them before I did development. I just didn’t want to waste stuff if others experienced similar results. I love h1000 and it’s easy to get
mine as well, its the most gain ive personally had wihich was about 90 fps between the new barrel and the 2nd firing on the brass. definitely never had much temp swings with h1000 even in the S TX. heat.
I use Atips exclusively for my 300 win and 50 BMG, with that said they perform amazing in the 300, including taking animals, the 50 is another story, target the are fine animal the explode.
I don't think the 7 PRC can launch a 190 A Tip fast enough to worry about blow ups, even the 166 at around 3200fps. The 190 A tip was definitely my favorite target bullet during testing. I did a 7PRC cartridge guide on tscustomsrifles. I'm not here to sell anything, just sharing the data, and there's a lot to look through.
I run a 26" barrel so it's not too hard to get 2900fps out of the 190-195gr bullets. A 30" barrel comfortably launches 190 A tips at 3k, and with the .420 G7 it really feels like cheating.
Berger 195EOL -0.030" with around 69gr Retumbo or 75gr LRT has worked well in a few different rifles/barrel lengths. OAL in a saami chamber is roughly 3.400".
190 Atip with 64.5gr H4831SC also 30 off has shot great as well. OAL around 3.395" in a saami chamber.
Obviously be smart, confirm your distance to the lands and start low/work up the powder charge. CCI250's and Hornady brass is what I have used so far. If you're using Peterson/ADG or Lapua, I'd start at LEAST 2 grains lower.
If you don't have those powders I use a number of powders and bullets in my guide.
New 6 lb 20" 7mm BC rifle with 170 gr terminal acent 3104 fps ammo .166" group factory ammo, first group shot with this ammo.
Same gun with factory 175 gr fusion tipped 3040 fps turning in several 1/4" 3 shot groups 93° today.
No issues.
The 7mm BC is the real deal. Especially for hunters who do not reload and want a light short rifle with exceptional ballistics...I intend to reload for the 7mm BC.
Same gun with factory 175 gr fusion tipped 3040 fps turning in several 1/4" 3 shot groups 93° today.
No issues.
The 7mm BC is the real deal. Especially for hunters who do not reload and want a light short rifle with exceptional ballistics...I intend to reload for the 7mm BC.
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I don’t think so. The 7prc has always had suoer odd book numbers. My first outing was at the hodgdon book max at the time like 64 grains or so but shot 200fps slower than expected. Then I remember looking at Hornady and seeing the same equivalent.
Took a bit of looking around to see everyone was at 67-68 grains of h1000 to achieve the advertised speed of about 3k.
I’ve never seen pressure at these loads but have always wondered what the discrepancy was
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I have multiple boxes loaded at 67.5 grains from March and April which was 0.1 grain above the advertised max for H 1000
I’m almost positive they changed it
I’m almost positive they changed it
Most load data is shot out of 24" test barrels, which were tighter dimensioned then production barrels used by the public in most cases.
They drop the charge weight in manuals cause sometimes you blow primers at max load.
One reason is because the powder burn rate in the new lot varies enough to cause trouble, but still is considered passed as it falls between the fence post pressure variation allowance...but needs a drop in charge weight to reach the average max pressure in the test barrel...so the civilians don't blow primers.
They drop the charge weight in manuals cause sometimes you blow primers at max load.
One reason is because the powder burn rate in the new lot varies enough to cause trouble, but still is considered passed as it falls between the fence post pressure variation allowance...but needs a drop in charge weight to reach the average max pressure in the test barrel...so the civilians don't blow primers.
The disappointing velocities of the seven PRC compared to the hype have been much discussed
I’m talking about how I am almost positive that the Max published loaded data are falling three gr short in the last six months
I’m talking about how I am almost positive that the Max published loaded data are falling three gr short in the last six months
Yeah and BERGER tends to be conservative with their low data as I recall
So what’s with the downward creep on the published charges?
So what’s with the downward creep on the published charges?
Yes I believe they reduced the charges recently as well. I have their reloading data on the app and noticed a change randomly. Someone mentioned that there may have been a change in formulation of certain powders and they reduced stuff across the board to ahead of possible issues with their data.
Im shooting 180gr hybrids with H4831sc and the previous max had been 64.5gr I believe and now it is well below that.
Im shooting 180gr hybrids with H4831sc and the previous max had been 64.5gr I believe and now it is well below that.
Nothing new. They did the same thing to the 7rem mag. Early reloading data showed higher charge weights compared to recent publishings.
Whether its hype to help sell the newest wiz bang cartridge, or lot variations coming into play, it happens.
IMO the 7prc is not a hotrod, per se. It's more of a beltless 7rem mag with a modern shoulder angle and twist.
Whether its hype to help sell the newest wiz bang cartridge, or lot variations coming into play, it happens.
IMO the 7prc is not a hotrod, per se. It's more of a beltless 7rem mag with a modern shoulder angle and twist.
Those are published with a 26” barrel as well.
I’m getting 2,850 with Hornady factory 175 ELDX in a 21” Bartlein 8 twist. So I don’t think I’m far off that chart.
I’m getting 2,850 with Hornady factory 175 ELDX in a 21” Bartlein 8 twist. So I don’t think I’m far off that chart.
Monday bought a new 7mm Backcountry 20" barrel.
Shot it Tuesday with factory ammo.
Built dies and needed reloading tools Wednesday.
Reloaded for it Thursday...
Had some 7 mm 180 gr Berger bullets left over from the old 7mm mag days.
Shot reloads in the 7 mm BC today.
Top velocity in a 20" barrel was 3118 fps for the 180 gr Berger.
Felt one load with a slightly stuff bolt... and will consider 3075 fps max for this powder.
But 3050 fps is easily attained with 180 gr Berger with possibilities of excellent hunting accuracy in the 3050 to 3075 fps area.
Shot it Tuesday with factory ammo.
Built dies and needed reloading tools Wednesday.
Reloaded for it Thursday...
Had some 7 mm 180 gr Berger bullets left over from the old 7mm mag days.
Shot reloads in the 7 mm BC today.
Top velocity in a 20" barrel was 3118 fps for the 180 gr Berger.
Felt one load with a slightly stuff bolt... and will consider 3075 fps max for this powder.
But 3050 fps is easily attained with 180 gr Berger with possibilities of excellent hunting accuracy in the 3050 to 3075 fps area.
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why are we talking about 7BC in the 7PRC thread? You gonna put it in 7mmRM and 7LRM threads too?
I will keep my slightly reduced MV, better barrel life, and better offerings for brass to reload of my 7PRC with essentially same effect on target of ranges inside roughly 1,000 yards.
I just can’t see the juice being worth the squeeze on the 7BC. Just my $0.02 though.
Now back to the 7PRC.
I just can’t see the juice being worth the squeeze on the 7BC. Just my $0.02 though.
Now back to the 7PRC.
So here's the deal. I'm not easily impressed with all the new cartridges. I shoot many of them.
And reload hybrid cases in 6.5 CM, 308, 6 Dasher, & many others, few may interested in.
The 7mm BC came out another 80,000 psi cartridge...I'm interested. Is it better than the hybrid case? Can it be reloaded?
The 7 mm BC is a new option, in an ocean of 7 mm's.
This one is actually different, not the same old thing.
And in factory loads, exceeds box printed velocities in 20" barrels. Nothing out there like it except the hybrid cased ammo.
With short 20" barrels, and 6 lb rifles it actually achieves magnum velocities with good accuracy. I had a .166" 3 shot group and several 1/4" 3 shot groups with factory 170 gr ammo running 3100 fps, or 175 gr at 3031 fps ave.
It's mostly a hunting caliber at this point.
No one has released dies for reloading yet, but I made my own reloading dies and testing reloaded ammo in it.
With velocities and load data posted for the 180 gr Berger first up and got to 3100 fps in the 20" barrel....3050 fps is a good load for this powder and the 180 gr Berger, bullet holes touching.
Run your ballistics calculator on the 180 gr Berger at 3118 at 2000 ft elevation and 93° impressive for a 6 lb rifle and a 20" barrel.
I will not baby this 7mm BC, I'm shooting the piss out of it.
At 93° I shot a 12 shot string with no barrel cooling, just one shot after another... to see what it does, no heavy bolt lift, easy extraction, on a hot barrel, on a hot day.
I will see how many hot loads one can get out of steel cases, ...and form some brass cases.... never run out of brass cases, with 270, 30-06, 280, etc brass available. This will turn it into a 280 Ackley.
Federal says the barrel life is comparable to other 7 mags and better than the really big ones because they burn so much powder, like the 28 Nosler.
We'll see...But it's good for a lifetime of hunting for non reloaders, as it stands today.
But it's definitely reloadable and gets good velocity with powders you can buy off the shelf today... and of course the few that are hard to find are also really good.
The 7 mm BC is a great hunting round as hunting season is near...and IMO one every hunter should consider, especially if you're not a reloader as most are not.
And reload hybrid cases in 6.5 CM, 308, 6 Dasher, & many others, few may interested in.
The 7mm BC came out another 80,000 psi cartridge...I'm interested. Is it better than the hybrid case? Can it be reloaded?
The 7 mm BC is a new option, in an ocean of 7 mm's.
This one is actually different, not the same old thing.
And in factory loads, exceeds box printed velocities in 20" barrels. Nothing out there like it except the hybrid cased ammo.
With short 20" barrels, and 6 lb rifles it actually achieves magnum velocities with good accuracy. I had a .166" 3 shot group and several 1/4" 3 shot groups with factory 170 gr ammo running 3100 fps, or 175 gr at 3031 fps ave.
It's mostly a hunting caliber at this point.
No one has released dies for reloading yet, but I made my own reloading dies and testing reloaded ammo in it.
With velocities and load data posted for the 180 gr Berger first up and got to 3100 fps in the 20" barrel....3050 fps is a good load for this powder and the 180 gr Berger, bullet holes touching.
Run your ballistics calculator on the 180 gr Berger at 3118 at 2000 ft elevation and 93° impressive for a 6 lb rifle and a 20" barrel.
I will not baby this 7mm BC, I'm shooting the piss out of it.
At 93° I shot a 12 shot string with no barrel cooling, just one shot after another... to see what it does, no heavy bolt lift, easy extraction, on a hot barrel, on a hot day.
I will see how many hot loads one can get out of steel cases, ...and form some brass cases.... never run out of brass cases, with 270, 30-06, 280, etc brass available. This will turn it into a 280 Ackley.
Federal says the barrel life is comparable to other 7 mags and better than the really big ones because they burn so much powder, like the 28 Nosler.
We'll see...But it's good for a lifetime of hunting for non reloaders, as it stands today.
But it's definitely reloadable and gets good velocity with powders you can buy off the shelf today... and of course the few that are hard to find are also really good.
The 7 mm BC is a great hunting round as hunting season is near...and IMO one every hunter should consider, especially if you're not a reloader as most are not.
Is this a joke?? It’s a fad round that won’t be around for long. You also purchased a weatherby so quite frankly your opinion is irrelevant
“It’s definitely reloadable” you reloaded for it one time…..
For me it's a test subject. And No joke.
I want to see what the 7mm BC capable of, short term and long term.
Right now it's about the fastest 7mm available.
Put in a 24" barrel it'll do 3200 fps with a 180 Berger...reloaded.
Interesting, no?
I can reload it indefinitely...I don't need industry support...but that would be nice for others.
I can even use cheap/ free, range pick up brass cases 30-06? 270?...with less performance, but it'll still be shooting...Reloads.
This is my first Weatherby in 307...I like it ...so far. "Its been taking a licking and keeps on ticking." A nice test subject.
Chambered replacement barrels are available, in 7 PRC or 7 BC, plus actions short or long.
Let's see how it stands up long term...then we can judge it... for real.
It might be the perfect hunting rifle for some, but not for others...more choices.
And I like my opinion, and it's relevant... IMO.
So start a thread about the 7mm BC and stop posting your shit in every other thread. Nothing is stopping you from posting all this good, albeit misplaced, information in your own thread.For me it's a test subject. And No joke.
I want to see what the 7mm BC capable of, short term and long term.
Right now it's about the fastest 7mm available.
Put in a 24" barrel it'll do 3200 fps with a 180 Berger...reloaded.
Interesting, no?
I can reload it indefinitely...I don't need industry support...but that would be nice for others.
I can even use cheap/ free, range pick up brass cases 30-06? 270?...with less performance, but it'll still be shooting...Reloads.
This is my first Weatherby in 307...I like it ...so far. "Its been taking a licking and keeps on ticking." A nice test subject.
Chambered replacement barrels are available, in 7 PRC or 7 BC, plus actions short or long.
Let's see how it stands up long term...then we can judge it... for real.
It might be the perfect hunting rifle for some, but not for others...more choices.
And I like my opinion, and it's relevant... IMO.
Why exactly do you insist on polluting other threads with non applicable topics consistently? Is it for the attention or do you just not know how to start your own thread?
Serious question.
I already posted a thread on reloading the 7mm BC.
Unlike all the complaints about the 7 PRC not getting factory box velocity and is 200 fps down.
That is not the case with the 7mm BC, it runs faster than factory stated velocity...so some might consider a cartridge change to get the factory stated box velocity and performance in their hunting rifles. Just the facts.
You don’t get it do you?
You are off topic and being a “know it all” ass in another thread.
You do it consistently. While you may have good information, your delivery method is crap and very much perceived as that.
Good day sir!
I'm on topic the 7mm PRC performance is not up to expectations...much lower velocities then expected across the board.
And 200 fps down from printed factory box numbers is really significant....plus continued downward powder charges in loading manuals.
Just offered a solution to the low velocity problem.
Hornady hipes alot of their products, and they sell really well....I've bought into many of their cartridges.
Also have "improved" some cases, and added hybrid cases to boost performance and run bore riders.
Sometimes you're stuck with what ya get.
Just the facts.
Anyone who is looking for the speed you’re mentioning is doing it already, like with a 7-300prc for example. No need to experiment or make your own die’s, all available and tested by shooter’s that don’t load for the excessive dangerous pressure you’re chasing.
I get 2820fps with Berger 195’s over Retumbo, I haven’t found a situation quite yet where I felt like that wasn’t enough. But I’m also not limited to box ammo.
