Re: Barrell Length .450 BM Custom Bolt Rifle
Posted:
Tue Jan 11, 2022 10:23 amby coyote wacker
I've always liked shorter barrel rifles going back to my first a 8mm Mauser cut to 18" in 1968....first year a 450 Bushmaster could be used in Michigan Limited Zone only rifle I could find was a AR-15 with 20" so it was used and but my eye was on a 16" when it was available....
I use a 308 Win. in the UP with a 18" barrel....lot easer using in a box blind....
Re: Barrell Length .450 BM Custom Bolt Rifle
Posted:
Tue Jan 11, 2022 3:52 pmby Escape Pod
BlackForrester wrote:Escape Pod wrote:Someone did a test showing that the 16" barrel is only 1% less velocity/power than a twenty-something barrel. 18" might give you full velocity. 450BM is very efficient at burning its power fast apparently.
do you have a source/link for this test ?
It was in a review of the Ruger Ranch (16.1"). I can't find the review, but here's a couple data points.
This reviewer tested 2190ish FPS out of the 16" barrel on the Hornady round rated at 2200fps.
https://www.rifleshootermag.com/editori ... anch/83629These guys show a 2% drop in FPS going from 22inch barrel to 16.1" on their 250gr Lehigh Defense
https://www.northamericanammunition.com/450-bushmasterGood Luck!
Re: Barrell Length .450 BM Custom Bolt Rifle
Posted:
Thu Jan 13, 2022 12:09 amby BlackForrester
Thank you all very much guys!!
Re: Barrell Length .450 BM Custom Bolt Rifle
Posted:
Fri Jan 14, 2022 1:15 amby Texas Sheepdawg
I’m just here for the happiness.
Carry on!
Re: Barrell Length .450 BM Custom Bolt Rifle
Posted:
Wed Jan 19, 2022 7:03 pmby Escape Pod
Found the 1% source.
https://www.americanrifleman.org/conten ... fle-ranch/“ So, the only load I had on hand to work with was Hornady's Black label 250-gr. FTX with a listed velocity of 2200 fps. (using a 20" barrel) for a muzzle energy of 2686 ft. lbs. To see how this load performed out of the shorter 16.12" barrel, 10 consecutive rounds were fired across a Lab Radar chronograph. The velocity average was 2184 fps. for a muzzle energy level of 2648 ft. lbs. That's just about a 1 percent drop in velocity with only a 38 ft. lb. loss of energy with a 3.88" shorter barrel. I see nothing to complain about here.”
Re: Barrell Length .450 BM Custom Bolt Rifle
Posted:
Wed Jan 19, 2022 10:00 pmby Hoot
Most members shooting Black Box out of a 20" bolt action have reported MV's north of 2200. About 100 fps faster than those with 16" bolt actions. Truth be told, they're both lethal as hell! Its a matter of personal preference. FWIW, my 20" AR platform shoots them a little north of 2200 when its not cold out. I say that because i haven't clocked it on my LabRadar when its cold out. Just going on how ball powders generally behave compared to most stick powders.
Enjoy!
Hoot