A few people have asked for some technical specs on the new .30 RAR cartridge and, in no particular order, here are some of those answers.
Parent Case: The .450 Bushmaster. But the case head diameter was bumped up to .492” to prevent accidental chambering of other cartridges.
How about the bolt head? The bolt head is a modified .308 Win. bolt head that has been significantly beefed up to help handle the higher operating pressures generated by the .30 RAR. The .30 RAR is about a 55,000 psi cartridge vs. 38,000 psi for the 450 Bushmaster.
Last night while talking with DPMS President Randy Luth and Remington’s John Fink, who is the brand manager for the rifle division, they both said that the goal was to look at the AR lower and see how much cartridge they could fit in there.
How’s it shoot? Well, it turned out that there wasn’t a functioning rifle available to shoot yesterday, so that question is one I can’t answer. But as soon as I get my hands on one, I’ll post a report.
Any other questions, let me know and I'll get back to you.