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22-257 ??
idaho cowboy
Member Posts: 253 ✭✭✭
Is the 257 Roberts necked to 22 a common wildcat? I have not been able to find any information on it. I am interested in maybe building a heavy long range varmint rifle and am curious about how this cartridge would perform. Thanks
Comments
There are several versions of this cartridge all with different names and case styles.
The .257 Roberts case was common and readily available for decades so it was wildcatted frequently. One was named the .224 Clark but used the improved type case.
With the advent of the 6mm Remington case (.244 Rem.) the necking down process was more easily accomplished. This led to the modern version of the .224 TTH (Texas Trophy Hunter). I started with the standard .22-6mm case then went for the Ackley version a little later.
All of the versions, whether standard or improved, went for the extremes of the bullet weight spectrum. Light for extreme high velocities or heavy for hunting and long range target shooting. The version I'm using currently is a slight modification to the shoulder angle with the improved body capacity. I load 80, 85 and 90 grain VLD bullets for long range and tactical competitions.
Best.
Personally, I've considered building a tight twist .22 cal in anything from .220 Russian to .22-250 IMP. I've seen how fast a .22-243 {Middlestead(?)} can push bullets, as well as a hot loaded .220 Swift. And, how fast the barrels got burned out. Thus my reasoning for a smaller capacity .22 cal varmint rifle.
For competition, where all stops need to be pulled to get an advantage {and you want to spend that kind of money), I can see it. For a regular varmint rifle that might see 100 shots in a day taken, I wouldn't venture into the path that you might shoot out a barrel that quickly. Unless you want to spend that kind of money and can afford that kind of downtime.
As of yet, I'm still shooting a .223 for long range varminting and target work out to 1k. I use 68/69 gr. and 75/77 gr. competition bullets.
Edit: added,
Tailgunner,
I'm in agreement that most any .22-250 Imp. would burn barrels as quickly as the Swift if you were to sustain fire over a long day varminting. Not that it would help much, but my choice would not be to go with the full Ackley Imp. More of a 30 deg shoulder at most, possibly even hold it at 26 deg. or 28 deg. as Fred Huntingdon did with the 6mm (and I was told his version of the .22-250 Wildcat {pre Remington})
I'm in agreement with Mobuck here. The case is way overbore for a .22 cal.
Personally, I've considered building a tight twist .22 cal in anything from .220 Russian to .22-250 IMP. I've seen how fast a .22-243 {Middlestead(?)} can push bullets, as well as a hot loaded .220 Swift. And, how fast the barrels got burned out. Thus my reasoning for a smaller capacity .22 cal varmint rifle.
As of yet, I'm still shooting a .223 for long range varminting and target work out to 1k. I use 68/69 gr. and 75/77 gr. competition bullets.
The only difference between the 22-250 AI and the 220 Swift is the case design. Both have the same case capacity, and get the same velocity with the same powders at the same pressures.