Old news and I've beat it up often.

.378" pin to bolt fit is usually horrid. This one worse than that. 50gr V-Max 223AI form loads,at 3150-ish fps...which is very obviously...very SOFT. Positive headspace via both the shoulder and a smooch.

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The Cure.

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Same lot of ammo,pre bushing.

Many would "think" high pressure,but these are underhand softballs.

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Same lot,post bushing.

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'Nother,for conversation.

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Greg does all of mine and he touches upon it here. In fact,there should be another one freshly bushed,awaiting my arrival at the house.

Bye-Bye Craters

Hint.