I have FL sized some .308 Lapua brass once fired from another custom rifle with a Redding FL die with a .338 bushing, then a neck die with a .336 bushing, trimmed to 2.010”. No bullet has been seated in the brass. Chambers nicely and bolt close easily. Bolt lift is easy, but pulling back the bolt takes more effort on a small number of these pieces of brass. What is up with these pieces of brass?