Barrell Length .450 BM Custom Bolt Rifle

I know of one so far, let's see if more show up.

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Re: Barrell Length .450 BM Custom Bolt Rifle

Postby coyote wacker » Tue Jan 11, 2022 10:23 am

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....
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Re: Barrell Length .450 BM Custom Bolt Rifle

Postby Escape Pod » Tue Jan 11, 2022 3:52 pm

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/83629

These guys show a 2% drop in FPS going from 22inch barrel to 16.1" on their 250gr Lehigh Defense
https://www.northamericanammunition.com/450-bushmaster

Good Luck!
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Re: Barrell Length .450 BM Custom Bolt Rifle

Postby s4s4u » Tue Jan 11, 2022 10:45 pm

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Re: Barrell Length .450 BM Custom Bolt Rifle

Postby BlackForrester » Thu Jan 13, 2022 12:09 am

Thank you all very much guys!!
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Re: Barrell Length .450 BM Custom Bolt Rifle

Postby Texas Sheepdawg » Fri Jan 14, 2022 1:15 am

:D
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Carry on!
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Re: Barrell Length .450 BM Custom Bolt Rifle

Postby Escape Pod » Wed Jan 19, 2022 7:03 pm

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.”
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Re: Barrell Length .450 BM Custom Bolt Rifle

Postby Hoot » Wed Jan 19, 2022 10:00 pm

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!

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