OAL doesn't directly cause issues jamming bullets into rifling, even if it is an indicator. Sometimes bullet profile plays a part too. I had some factory 165 Gr .308 that did this in a REmington 700 chamber. It turned out to be bullet profile.
Esentially the bullet shape got too fat too fast & even though OAL was fine the length to ogive was too short. You might want to look at that.
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Allan Quatermain: “Automatic rifles. Who in God's name has automatic rifles”?
Elderly Hunter: “That's dashed unsporting. Probably Belgium.”
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