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6.5 Grendel V/S .224 Valkyrie

I haven't built either, but if I did, it would be the 6.5 Grendel for the sole purpose of getting more energy on steel targets. It's hard enough to see a .224 projo impact, though it can still be heard if it's not a busy range. The heavier 6.5 projos will allow the steel to react better.