IMR 8208 XBR and the .308 Win
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Re: IMR 8208 XBR and the .308 Win
So far so good with Sierra 2156's. I am in the single digits (barely) with the spreads, and have the speed up to 2861 average out of a 20" Rock barrel. I will adjust seating depth to tighten up the groups from here on out.
It's a good powder.
So far so good with Sierra 2156's. I am in the single digits (barely) with the spreads, and have the speed up to 2861 average out of a 20" Rock barrel. I will adjust seating depth to tighten up the groups from here on out.
It's a good powder.
Re: IMR 8208 XBR and the .308 Win
Try this article:
http://bulletin.accurateshooter.com/2010/03/imr-8208-xbr-performs-well-in-308-win-testing/
--Rootshot
Try this article:
http://bulletin.accurateshooter.com/2010/03/imr-8208-xbr-performs-well-in-308-win-testing/
--Rootshot
Re: IMR 8208 XBR and the .308 Win
http://www.snipershide.com/forum/ubbthreads.php?ubb=showflat&Number=2264265
I'm having great luck with it.
Just got some Lapua brass in, so I am going to see how hard I can push the 155 and 178 amax's I have on hand.
http://www.snipershide.com/forum/ubbthreads.php?ubb=showflat&Number=2264265
I'm having great luck with it.
Just got some Lapua brass in, so I am going to see how hard I can push the 155 and 178 amax's I have on hand.
Re: IMR 8208 XBR and the .308 Win
Thanks good read.
I have some test loads made up with 3 bullet weights, just needsome range time....
Thanks good read.
I have some test loads made up with 3 bullet weights, just needsome range time....
Re: IMR 8208 XBR and the .308 Win
I have great results with 8208 and the 155 lapuas moly. 30" barrel getting 3050 out of it. Son set the Junior National Record with this load at 600 yards. The powder preforms good for my loads with single digit SDS.
I have great results with 8208 and the 155 lapuas moly. 30" barrel getting 3050 out of it. Son set the Junior National Record with this load at 600 yards. The powder preforms good for my loads with single digit SDS.
Re: IMR 8208 XBR and the .308 Win
I've been fooling with it and love it. I've done some load ups with 155 grain Nosler CCs (J4), Winchester brass, and CCI BR2 primers.
Starting out I worked up from 44.5 to 46 grains, with 46 being way too hot. One primer pierced. I settled in on 45.6 grains and did some seating depth testing, after which I tried it out at 720 yards and shot way over the target. My chronograph gave me extremely consistent numbers, and once I got on paper at 400 yards my dope said the velocity was right at 3,000 fps out of a 20" barrel, which is impressive if not extremely dangerous. I had bad ejector wipe on every case, so I stopped shooting them. I'm going to back down to the lower node that I found at 44.8, which from all of my research is a common charge.
I've been fooling with it and love it. I've done some load ups with 155 grain Nosler CCs (J4), Winchester brass, and CCI BR2 primers.
Starting out I worked up from 44.5 to 46 grains, with 46 being way too hot. One primer pierced. I settled in on 45.6 grains and did some seating depth testing, after which I tried it out at 720 yards and shot way over the target. My chronograph gave me extremely consistent numbers, and once I got on paper at 400 yards my dope said the velocity was right at 3,000 fps out of a 20" barrel, which is impressive if not extremely dangerous. I had bad ejector wipe on every case, so I stopped shooting them. I'm going to back down to the lower node that I found at 44.8, which from all of my research is a common charge.
Re: IMR 8208 XBR and the .308 Win
So does this look like it will be a long term available powder?
Seems to go fast here-limited availablity and fear of abandonment are why I haven't tried it....
So does this look like it will be a long term available powder?
Seems to go fast here-limited availablity and fear of abandonment are why I haven't tried it....
Re: IMR 8208 XBR and the .308 Win
I hope so. I have 8 lbs, so I'll have some for awhile. I haven't heard anyone talk bad about it, and have read many success stories from folks using it with lighter bullets.
I hope so. I have 8 lbs, so I'll have some for awhile. I haven't heard anyone talk bad about it, and have read many success stories from folks using it with lighter bullets.
Re: IMR 8208 XBR and the .308 Win
I think this powder is here to stay. It is suppose to be a very stable powder for temps.
I think this powder is here to stay. It is suppose to be a very stable powder for temps.
Re: IMR 8208 XBR and the .308 Win
My accuracy results were acceptable but I ran into pressure before I got any real velocity. For me varget does the same with lower pressures.
My accuracy results were acceptable but I ran into pressure before I got any real velocity. For me varget does the same with lower pressures.
Re: IMR 8208 XBR and the .308 Win
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: scap99</div><div class="ubbcode-body">http://www.snipershide.com/forum/ubbthreads.php?ubb=showflat&Number=2264265
I'm having great luck with it.
Just got some Lapua brass in, so I am going to see how hard I can push the 155 and 178 amax's I have on hand. </div></div>
I'm pushing 178s at 2700 fps with Varget out of a 26' tube.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: scap99</div><div class="ubbcode-body">http://www.snipershide.com/forum/ubbthreads.php?ubb=showflat&Number=2264265
I'm having great luck with it.
Just got some Lapua brass in, so I am going to see how hard I can push the 155 and 178 amax's I have on hand. </div></div>
I'm pushing 178s at 2700 fps with Varget out of a 26' tube.
Re: IMR 8208 XBR and the .308 Win
Went out today and only achieved 2510fps with the 8208 in a 20" Remington 700. It shot well but just to slow.
Went out today and only achieved 2510fps with the 8208 in a 20" Remington 700. It shot well but just to slow.
Re: IMR 8208 XBR and the .308 Win
Which bullet? How much velocity are you really expecting to get from a 20" (I'm guessing factory) tube?
A fellow team mate seems pretty enamored with this stuff (8208), says he gets similar speeds to the Varget loads we've been using with almost 2gn less powder... which seems fairly consistent with what others have been reporting.
I've been a little leery of the stuff as I heard a few rumors that there was a bit of a shift in burn rate between the first lot imported and subsequent lots that bit some people. Hopefully they got that sorted out by now...
Which bullet? How much velocity are you really expecting to get from a 20" (I'm guessing factory) tube?
A fellow team mate seems pretty enamored with this stuff (8208), says he gets similar speeds to the Varget loads we've been using with almost 2gn less powder... which seems fairly consistent with what others have been reporting.
I've been a little leery of the stuff as I heard a few rumors that there was a bit of a shift in burn rate between the first lot imported and subsequent lots that bit some people. Hopefully they got that sorted out by now...
Re: IMR 8208 XBR and the .308 Win
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: memilanuk</div><div class="ubbcode-body">........says he gets similar speeds to the Varget loads we've been using with almost 2gn less powder... which seems fairly consistent with what others have been reporting.
I've been a little leery of the stuff as I heard a few rumors that there was a bit of a shift in burn rate between the first lot imported and subsequent lots that bit some people. Hopefully they got that sorted out by now... </div></div>
The last part has me leery...
The first part sounds like you're describing IMR4895.
I've had very good luck with I4895 and temp. I see no more shift than Varget temp wise and run approx 5% less powder for the same speeds.
Bruno's got I blieve 100 8lb'ers of the 8208 and they were down to a dozen or so really quickly.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: memilanuk</div><div class="ubbcode-body">........says he gets similar speeds to the Varget loads we've been using with almost 2gn less powder... which seems fairly consistent with what others have been reporting.
I've been a little leery of the stuff as I heard a few rumors that there was a bit of a shift in burn rate between the first lot imported and subsequent lots that bit some people. Hopefully they got that sorted out by now... </div></div>
The last part has me leery...
The first part sounds like you're describing IMR4895.
I've had very good luck with I4895 and temp. I see no more shift than Varget temp wise and run approx 5% less powder for the same speeds.
Bruno's got I blieve 100 8lb'ers of the 8208 and they were down to a dozen or so really quickly.
Re: IMR 8208 XBR and the .308 Win
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: memilanuk</div><div class="ubbcode-body">Which bullet? How much velocity are you really expecting to get from a 20" (I'm guessing factory) tube?
A fellow team mate seems pretty enamored with this stuff (8208), says he gets similar speeds to the Varget loads we've been using with almost 2gn less powder... which seems fairly consistent with what others have been reporting.
I've been a little leery of the stuff as I heard a few rumors that there was a bit of a shift in burn rate between the first lot imported and subsequent lots that bit some people. Hopefully they got that sorted out by now... </div></div>
Sorry, 178 amax's. I run them with IMR 4064 at 2650 for comp, and was hoping to get a load with 8208 that was close to that fast. My only issue with the 4064 is if they get warm from the sun or just a warmer day I have to move down the loads to keep from getting mild sicking cases, but they shoot lights out.
It was worth a shot anyway.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: memilanuk</div><div class="ubbcode-body">Which bullet? How much velocity are you really expecting to get from a 20" (I'm guessing factory) tube?
A fellow team mate seems pretty enamored with this stuff (8208), says he gets similar speeds to the Varget loads we've been using with almost 2gn less powder... which seems fairly consistent with what others have been reporting.
I've been a little leery of the stuff as I heard a few rumors that there was a bit of a shift in burn rate between the first lot imported and subsequent lots that bit some people. Hopefully they got that sorted out by now... </div></div>
Sorry, 178 amax's. I run them with IMR 4064 at 2650 for comp, and was hoping to get a load with 8208 that was close to that fast. My only issue with the 4064 is if they get warm from the sun or just a warmer day I have to move down the loads to keep from getting mild sicking cases, but they shoot lights out.
It was worth a shot anyway.
Re: IMR 8208 XBR and the .308 Win
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Robot Doc</div><div class="ubbcode-body">
I'm pushing 178s at 2700 fps with Varget out of a 26' tube. </div></div>
Same for me with 8208. 42.3grns out of a factory savage 26" 1 in 10 twist.
Looks like I'm a little over max based on Hornady 8th, but no pressure signs.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Robot Doc</div><div class="ubbcode-body">
I'm pushing 178s at 2700 fps with Varget out of a 26' tube. </div></div>
Same for me with 8208. 42.3grns out of a factory savage 26" 1 in 10 twist.
Looks like I'm a little over max based on Hornady 8th, but no pressure signs.
Re: IMR 8208 XBR and the .308 Win
8208 is a fair jump faster than varget. I didn't even try it with the heaviver bullets because i was sure i'd see pressure before good velocity.
The reason I tried it with the 155's is because i have to trickle my charges into each case when using varget, which slows me down. I prefer just throwing from the measure into a loading block full of cases.
8208 is a fair jump faster than varget. I didn't even try it with the heaviver bullets because i was sure i'd see pressure before good velocity.
The reason I tried it with the 155's is because i have to trickle my charges into each case when using varget, which slows me down. I prefer just throwing from the measure into a loading block full of cases.
Re: IMR 8208 XBR and the .308 Win
Was at the range today, tried 3 loads:
40 grs. 8208XBR with a 178 BTHP hornady 5 shots 1/2" @ 100
43 grs. 8208XBR with a 168 CC 5 shots 3/8" @ 100
45 grs. 8208XBR with a 155 CC 5 shots 3/4" @ 100
Chrony crapped out due to cold(ongoing problem) and there was way to much snow to consider the 300 yard hike so no velocity results and only 100 yard 5 shot groups, 168 grain load shows promise. No loads showed pressure signs, but it was about 7 degrees F, 1/4 value 9 oclock wind, clear sky.
All loads shot in PGW Coyote, NSX 8-24, Lapua Palma brass CCI BR4 primer .010" off the lands
YMMV
Andy
Was at the range today, tried 3 loads:
40 grs. 8208XBR with a 178 BTHP hornady 5 shots 1/2" @ 100
43 grs. 8208XBR with a 168 CC 5 shots 3/8" @ 100
45 grs. 8208XBR with a 155 CC 5 shots 3/4" @ 100
Chrony crapped out due to cold(ongoing problem) and there was way to much snow to consider the 300 yard hike so no velocity results and only 100 yard 5 shot groups, 168 grain load shows promise. No loads showed pressure signs, but it was about 7 degrees F, 1/4 value 9 oclock wind, clear sky.
All loads shot in PGW Coyote, NSX 8-24, Lapua Palma brass CCI BR4 primer .010" off the lands
YMMV
Andy
Re: IMR 8208 XBR and the .308 Win
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: sobrbiker883</div><div class="ubbcode-body">So does this look like it will be a long term available powder?
Seems to go fast here-limited availablity and fear of abandonment are why I haven't tried it.... </div></div>
It is a very close formulation as an old BR powder from years ago. Back then it was called Thunderbird. Before that it was a military surplus powder.
I did some extensive testing here in Kentucky both last Summer in 100 degree weather, and around Christmas in 20 degree weather. The velocities were identical as were the results on paper. A good powder in my book. It has all of the good characteristics of Varget and none of it's failures.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: sobrbiker883</div><div class="ubbcode-body">So does this look like it will be a long term available powder?
Seems to go fast here-limited availablity and fear of abandonment are why I haven't tried it.... </div></div>
It is a very close formulation as an old BR powder from years ago. Back then it was called Thunderbird. Before that it was a military surplus powder.
I did some extensive testing here in Kentucky both last Summer in 100 degree weather, and around Christmas in 20 degree weather. The velocities were identical as were the results on paper. A good powder in my book. It has all of the good characteristics of Varget and none of it's failures.
