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Discussion in 'Gunsmithing' started by APynckel, Oct 12, 2017.
Who should I go to to order a barrel for this rifle?
MY initial thought would be to call Shilen, in Ennis, Tx. They're due north of you on I-45, so if you have reason to visit the D/FW MetroMESS, they're on the way. The turn-around COULD be shorter from out-of-state suppliers, but you'd certainly lose the logistical convenience.
Point of curiosity: The original .220 Swift barrels had a gradual twist compared to other cartridges, to optimize for the lighter projectiles. Are you contemplating a faster twist, to stabilize heavier bullets?
How bout that. I had no idea Shilen was based in Ennis. I go up to dfw often. Though I'd probably just order something unless it really needs to be stupid custom.
No. I want to stay true to the lighter faster barrel-burning rounds. 40-50gr
I might be tempted to optimize for something slightly heavier, though not WAY heavier. I can understand the wish to keep it as it came to you, though. I have 87 .220 Swift cases, in unknown condition. If you'd like them, they could be had for somewhat less than what I'm seeing them priced at the usual places.
I had like 400 cases sent to me by someone off the AR15 forums and I have since annealed them all. I'm good in the brass department, but thank you.
Putting load data through the noggin, I might be persuaded to load some 55gr Vmax's in it. But I still think those fall into the standard twist rate for the rifle.
There's another consideration about using the heavier projectiles. Barrel life is a function of the inverse square of the average velocity of the projectiles run through it. If you shoot all your ammo at 4000 f/s and the barrel lasts, let's say, 1000 rounds, if you were to run the same projectiles through the barrel at 2000 f/s, the barrel would last for about 4000 rounds. If you use heavier projectiles that have a muzzle velocity of 3600 f/s, the barrel would last for about 23% more rounds.
I have NO idea of what the actual barrel life for a .220 Swift is. I just used the numbers above to illustrate what I'm saying.
Yes, I know how "barrel burners" burn their barrels. I'd just rather keep the gun within the confines of its original intent.
And there's not a thing wrong with THAT, either.