r/canadaguns • • 1d ago

Misc Question about 12 G to 45-70 insert

I bought a couple short sub caliber inserts for my coach gun, some rifled and some smooth bore.

One in particular is a 45-70 smooth bore insert with like an inch or less of actual bore. I know these are meant to be safe but has anybody used them before? It’ll be in a 12 gauge coach with a 12” barrel.

My main concern is, is this round going to tumble wildly striking the barrel before it can escape the muzzle?

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