Good trigger time with the M16 system is good trigger time. My primary weapons system is the M4 Carbine and I've set my M&P15-22 to mimic it as closely as possible. They may be marketed to the Jack Bauer set, but that didn't stop me from buying one.
2000 rounds of .22LR at 3¢/shot cost me $60. Add $500 for the rifle and clone aimpoint (to mimic my M68 CCO) and total cost is $560. (Actually I have less than this in the system, but this is an example.)
Lake City M193 Ball (AKA 55gr for those in Rio Linda) runs 45¢ a round in bulk, or $900 for those same 2000 rounds down range. So far in this example, the M&P15-22 has saved me in excess of $300 for the same amount of front sight time. Shooting cheap Wolf? At 24¢/round the break-even point comes about the 2500 round mark.
-- Chuck