That is a really big action for a round that is very short. A loaded 5.7 round is over 1/8" shorter than a piece of 5.56 brass. I hate so see people use an action too big for their round; a .308 in a long action, a .223 in a short action... That is why I like the mini-mauser type actions CZ uses for the 527 rifles. I have been wondering if I could do a 5.7 on a CZ 452 rimfire action. I built my RBRP Target action into a 6.5x284, a round most people use a long action for.
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