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1/7 twist 53 grain flat base bullet

762willdo

I have a buddy that wants to shoot these in a 22-250AI will they work? Spin too fast and come apart?
I have no experience in light bullets………
 
It would be significantly too fast for me.

Assuming the muzzle velocity is ~ 3500 fps, the rpms would be 336K. That's a good 50-60K rpm faster than factory recommendations.
 
Is there a formula you used for this RPM……I checked the Berger calculator and it said it was fine but I was hoping for real world info like yours..
 
Just don't try it with any add on muzzle device attached to the barrel such as a muzzle brake or a suppressor for when they do come apart ; )

Muzzle Velo (multiple x720) divide that number by the twist rate.

I've been shooting a daily diet of 50 gn TNT's at 340,000 rpms with no failures yet from a 7 twist barrel but i refuse to put anything on the end of the barrel just in case.
Dan
 
I’ve never seen a bullet blow up at the muzzle it always takes a bit from them to hit maximum rpm they usually blow up about 5-10 feet in front of the muzzle…….
just my experience
 
I agree^^ me either but there are guys out there shooting the new 8.6 Blackout with 3 twist barrels that ARE and i'm not willing to risk the expense of a suppressor to find out the hard way!
 
I own a couple of 22 Dasher chambered rifles with 8 twist barrels and have been shooting Bart's Ultra 52 grain flat base bullets in one of the riles at just shy of 4000fps without any bullet issues. In the other rifle I shoot the 53 grain V-Max bullets again without any issues.
 
I regularly shoot 55g in my 8 twist 222. No issues so far, but the velocities are somewhat lower. Waters, in "Pet Loads" advocated for 10 twist in 22-250, way back when.
 
I have a 14.5 midlength Sabre Defense barrel (marked 1/7) that spins apart Hornday 55 gr soft point (flat base) bullets for some reason. It took me a minute to figure out what was going on.
 
Shoot a few and see. My experience tells me that if the bore isn't rough you should be OK. I can also tell you that with that spin rate blow up on varmints will be impressive.

Rick
 
I've shot 50gr lead nose out of a .223 with a 1/7 twist and it was very accurate but I don't know about the 22-250.... Load some up and take them to the range and shoot them the distance they need to fly... Will prove if they will work and be dependable or you may find out the bullets are to light for the distance you need....
 
I agree, I too have never seen a bullet blow up at the muzzle, but am wondering about the statement about a bullet gaining rpms after it leaves the muzzle. Are you sure thats right? I always assumed that air resistance and other external forces slowed the bullet as it left the barrel and could no longer be pushed by the powder charge. Am I wrong???? I have seen 162s blow up at about half way to the target at 600yds.
 
jelenko said:
Right. The bullet's rpm will only go down after leaving the muzzle.

At the same time, bullets flying apart are usually observed down range a bit.
Click to expand...
How do they measure the rotation of the bullet, I looked on you tube and there is no video with a super super super Slomo camera or anything like that……..anyone know?
 
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