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300 Win Mag build - Input appreciated.

Butters_Aus

Butters_Aus

Private
Full Member
Minuteman
Feb 28, 2013
25
12
#1
G'Day guys,

I'm a little bit of a lurker on these forums, however don't get me wrong I get a lot of very useful information and enjoyment at everyone showing off their own rifles.

At present I am putting together a 300wm using a Stiller Spectre Action, Jewell trigger, in an AICS.

Pretty much just leaves the barrel...

So, circumstances are the rifle will be used pretty exclusively between 700-1000 metres, and most likely using something like the 208gr Amax projectiles. I am not permitted a muzzle brake for comps on my particular rifle range, however I'm my too concerned about that, it will be heavy and that will dampen recoil a little.

My concern is that because I am looking at getting a long barrel, 30" or there abouts, and I don't want to go too heavy for the action. I'm not the most knowledgable person on pushing the limits and I would love to hear some people thoughts on an appropriate barrel for it, including profiling.

Thanks
Nut
 
#3
26" but I say M24/M40 contour since your not permitted the use of a brake. Anybody can disagree or be macho as much as they want but shooting an unbraked 300WM more then a few times in a row is NOT fun, especially with those heavies.
 
#4
I have a 25 inch 300 with a heavy Palma. Recoil isn't bad. I would look at a light varmint or a M24/M40. If you are after performance a 27 or 28 inch barrel with a 10 twist will really fling the Berger 230 Hybrids.
 
#5
I run a 26" light Palma that's fluted, though it is also braked. Brakes do offer a recoil reduction that is not insignificant. W/o a brake, a medium Palma would be a good choice. Stock design also plays a big part in "shootability" of the belted magnums in my experience.

If you have a chance to shoot an unbraked 300 in your chosen stock design, I would suggest you do so.

Good luck with your project.
 
#6
PatrickChewing said:
I have a 25 inch 300 with a heavy Palma. Recoil isn't bad. I would look at a light varmint or a M24/M40. If you are after performance a 27 or 28 inch barrel with a 10 twist will really fling the Berger 230 Hybrids.
Click to expand...

Hahh.. Huhh.. "Recoil isn't that bad" LOL..!! This coming from the man who's street name is "Vanilla Gorilla"! I don't think the recoil of a BUS would affect you Clay! ;)
 
#7
210 grain Bergers convinced me to install a brake ( Score High ) on my 26" Douglas / Sako AV . I've been shooting this rifle with 180's for many years without a brake and it only took 30 rounds of hand-loaded work up rounds and a black and blue shoulder to show me what I'm made of !
Total weight of my rifle is right around 13 pounds
 
#8
A 28 inch Kreiger in #17 contour is a little too heavy unless you plan to plant the gun and not move too much with it. In the case for F class or benchrest, the 17 contour is great but a Harris Bipod will bend after a while because of the weight.
 
#9
Pusher591 said:
26" but I say M24/M40 contour since your not permitted the use of a brake. Anybody can disagree or be macho as much as they want but shooting an unbraked 300WM more then a few times in a row is NOT fun, especially with those heavies.
Click to expand...

This is absolutely true in my experience. I'd suggest to ask Stiller about length and/or weight of barrel for that action and caliber. Then if it was to be purpose built for what you describe, I'd max it out length and weight with a 10 twist and throw heavies out of it. You can always trim it. Looks like the action would be stiffer than others due to the rail milled into it so 30" might work. Good luck with your project.
 
#11
Thanks for the suggestions guys.

I am leaning towards a long and heavy barrel, something along the line of a 30" heavy profile (eg. no17 Kreiger that was suggested).

I want it as heavy as possible to reduce as much recoil as possible, unfortunately a brake is not on the cards due to f class rules and my local range rules. And of course it has to be long for optimum performance at the longer ranges.

This rifle is not meant to be very mobile! Lol.

All in all I already have a ripper .308 (pic attached) and my aim was to produce a 'big brother' version. Still using an AI chassis to keep ergonomics the same, but I wanted a bit more oomph for longer range.

Thanks again for the suggestions.

Nut

 
Last edited:
#12
Surffshr said:
This is absolutely true in my experience. I'd suggest to ask Stiller about length and/or weight of barrel for that action and caliber. Then if it was to be purpose built for what you describe, I'd max it out length and weight with a 10 twist and throw heavies out of it. You can always trim it. Looks like the action would be stiffer than others due to the rail milled into it so 30" might work. Good luck with your project.
Click to expand...

Thanks, I'll send an email off to Stiller to ask them what they would consider the limit to the LA Spectre Action. Hopefully will get a reply sooner rather then later.
 
#15
For what your doing I'd go with what these guys are saying. 30" is too long. I've got a 30" broughton 5c on a trued 700 action in an AICS. I got the Sendero contour to help offset some of the weight and it heats up pretty damn quick. An mtu contour 1:10 at 26 to 27" would be heavy , but your bbl would cool quicker and I'd also look into getting it fluted to take away some weight. I had mine built for the 215 and 230 bergers. It's a HAMMER and is ridiculously accurate , but with a 30" bbl and a 2 " thruster break , there is NO WAY I'd ever use it shooting anything but off a bench or prone. It's just too cumbersome to maneuver.
So, for what it's worth, I'd also look into the 215 Berger hybrids. If you can get it throated right , you'll have more than enough room for powder, and it'll still fit in AI mags. Also the bearing surface is so little that they will shoot faster than the 208's with the same charge weight.
My Broughton is pushing the 215's at 3034 fps. 10.1 mils to hit 1330 yards. It's extremely fast, flat and fucking DEADLY.



 
#16
SWAT Article BARREL LENGTH

Im not surprised aimsmallmisssmall only gets 3030 out of his 30" barrel. My 24" hunting rifle I get 3010 with 210's (no pressure). Maybe he isn't taking advantage of long barrel with a super slow powder like h1000 or Rotumbo? Or just wants to keep pressure low for longer barrel life (I respect that also). For some reason 300's, like the 338LM, is not that sensitive to barrel length if the load is worked up properly.

Didn't post article to talk you out of a long barrel f-class rig, just to point out the importance of matching the load to your barrel length.

I am curious if you want a long barreled laser, why you don't do a 7mm build? less weight better bc bullets going considerably faster with less recoil. Just a thought. a 7wsm on a long action is a great combo with 180's (throated long)

If stuck on the 30" 300wm, I would do a heavy palma and work up a load with the bergers and H1000. I think that would be a deadly combo. I just built a 300wm for a friend. 22" med palma but we havnt worked a load yet (will use 4350 and 4831 - both a faster powder). Still waiting on a scope from Burris (hope today)

And don't worry about that stiller. It can handle any barrel you put on it.

Regards,
DT

Regads,
DT
 
#17
I did a Stiller Tac 300 -- Jewel -- AI AX Chassis -- Bartlein 24 1/4" M24 contour with a Surefire 7.62 RC.

I'm incredibly happy with the rifle...I chose the Tac 300 over the Specter after talking with one of them on the phone...Went with a Jewel because I clean the shit out of my gear...I do have NV so, the AX made more sense and the 24 1/4 -- I decided was best for me after some serious math -- I shoot 208 - 220 + some 240's when they're available...I also stick with h1000 religiously...When my suppressor breaks out of ATF jail, I'll be happy happy happy!

My advice would be to build this for you and do the math, yourself per what's available to you...A barrel swap isn't the end of the world however, so I wouldn't limit yourself based on your barrel!
 
#18
D_TROS said:
SWAT Article BARREL LENGTH

Im not surprised aimsmallmisssmall only gets 3030 out of his 30" barrel. My 24" hunting rifle I get 3010 with 210's (no pressure). Maybe he isn't taking advantage of long barrel with a super slow powder like h1000 or Rotumbo? Or just wants to keep pressure low for longer barrel life (I respect that also). For some reason 300's, like the 338LM, is not that sensitive to barrel length if the load is worked up properly.

Didn't post article to talk you out of a long barrel f-class rig, just to point out the importance of matching the load to your barrel length.

I am curious if you want a long barreled laser, why you don't do a 7mm build? less weight better bc bullets going considerably faster with less recoil. Just a thought. a 7wsm on a long action is a great combo with 180's (throated long)

If stuck on the 30" 300wm, I would do a heavy palma and work up a load with the bergers and H1000. I think that would be a deadly combo. I just built a 300wm for a friend. 22" med palma but we havnt worked a load yet (will use 4350 and 4831 - both a faster powder). Still waiting on a scope from Burris (hope today)

And don't worry about that stiller. It can handle any barrel you put on it.

Regards,
DT

Regads,
DT
Click to expand...

Your actually spot on with me not hot dogging my loads. I am running Retumbo with the 230's and have gotten up to 3,000 fps. But when you run the #'s, there's no real advantage in gaining another 50 to 60 fps for what I'm doing. I'm running H1000 with the 215's and have a safe load at 3100 fps but there is no reason to beat up my brass, kill my bbl quicker, ect. I actually have found that the 215's work best at around 3,000 fps and the 230 hybrids at 2955 fps. The 230 OTM , which I load to mag length in order to have a quick follow up shot if needed, for shooting deer , hogs, ect at long range runs best at 2900. Shot a doe this past season at 660 yards and she was dead before I heard the bullet whack her. So, yes , I could push it harder, but I see no point.
I'm surprised that your getting that velocity with the 210 vld out of a 24" bbl w/o getting atleast some op. Power Pro 4000 mr I could see getting that speed but still would be hot. Retumbo also I could see. That's some serious speed your getting regardless. What powder you running???
 
#20
Everyone builds a rifle with "their" purpose in mind. I took a lot of info from aimsmall when I built my 300. I did go with a long ass broughton barrel finished at 30.5 plus brake and a lot heavier profile so I could shoot longer strings with a lot less felt recoil. I am around 18lbs w/ scope. Shoots like a .308. I also went with a 1 in 9 twist to be able to shoot 240s if I wanted. 230s,215s were not available when I ordered the barrel. believe it or not but so far some fgmm with 190s shot one hole groups during break in (chrono at 3100fps). Only had it out a couple of times and working on loads so nothing to brag about with my loads.

My suggestion to 7he Nut take in a lot of info and build what you want. everyone has a success story. yours will be no different.
 
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