TaperPin
WKR
- Joined
- Jul 12, 2023
- Messages
- 3,399
I really like the look of the Ackley cartridges - I haven’t yet actually seen a 243 Super Rockchucker case or even a good drawing of the dimensions, so I’m not sure how close it is to the Ackley. One person said it’s very close to an Ackley, but with not quite as much of a blunt shoulder. Carosafe has been picked up to cast the chamber and I’m excited to see the dimensions. Rounding up reloading dies for a decent price seems to be the biggest challenge - hopefully a 280AI bushing die will work for neck sizing. 243 Super RC dies do come up for sale from time to time, but nothing on EBay since having the barrel.I don’t have any experience, but I’m waiting on a 16.5” 6 PRC barrel from PBB then I got an itch to read all of P.O. Ackley’s books and I now want to build a 6mm-06AI or 6mm-270AI. I hope you share your results from your barrel!!
As you probably know, velocities for these vary all over the place - 200 extra fps over a 243 seems reasonable, but I won’t complain if it goes 300+ fps more with the extra 6” of barrel. There isn’t much information on the newer powders with this dinosaur, but there is probably a better choice than H4831.