Anyone know about barrle life with this cartridage? I've read 1200 rounds and still going (wildcat cartridges book). Is the longer neck a plus in more barrel life, been trying to decide between 22-243 Middlested, 22-284, 22 Vias... now I find the 22-257 Improved (224 Clark) when my 22-250 throat goes I want something diffrent to chamber in.
Thanks in advance.
Bob the nailer
one ragged hole...the quest for accuracy continues.
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American Gunsmith Association www.knowyourzero.com
Ya' just can't change the laws of physics, over bore cartridges = throat erosion. Seems to me, the only place those .22-243 wildcats shine is with heavy for caliber bullets at 3200/3400fps. Someone said, "speed fades, B.C.s go on for ever". The .22-243 Win. (simply the .243 case necked to .22) is quit popular here, on the Southern Plains. Heavy bullets are the ticket at those slower velocities. Cases are easy to make and don't have to be fire formed like the Middlestead does. Barrels last in the 1500-1800 round range depending on your load, how maticulous you are about cleaning, and how hot (temp wise) you get the barrel. If, when you have the barrel installed, your gunsmith opens up the feed port to the rear for an extended mag box you will have room to set your bullets out further as the throat wears and get some more rounds down the tube accurately. 55g. bullets at 3800-4000fps will wash out a throat in no time.
I am ordering a 22-243 win on monday, going to get a 28'' Douglas, went with the plain 22-243 just because it has less fuss than the others, 1-8 twist hoping for 75gr Amax, should make an Antelope pretty dead this fall. Good Luck! Let us know what you go with.
You've already gotten some of the answers here, but there's one other warning that I'd throw out here; the Clark made its reputation with the heavy weight bullets, and that's what it was originally intended for. That's fine and dandy, and with a good heavy weight match bullet, it'll do wonderful things at long range. However, heavy bullets are harder on barrels than lighter ones, even if you're dropping the velocities and pressures accordingly. I'd say the 1,200 round figure you originally cited here is pretty optimistic, and would be happy (thrilled, in fact) to hit the thousand round mark with this combination. Always heard the old adage that"speed costs money; how fast you wanna go?" I'd amend that a bit to include distance, as in "long range costs money, how far you wanna shoot?"
I shot my 22-243AI, 8 twist, more than a thousand rounds before I decided to set the barrel back. I rechambered it in 22-243 (plain) just to avoid fireforming cases to the AI configuration. Unless you have a fast twist 22-250 I wouldn't bother with the big cases. You gain very little useful ballistic advantage shooting the light bullets in the big cases.
If you just want to have some fun with the remaining barrel life, than by all means try the 22-243, 22-6mm, 22-284 or similar; you'll have blast!