45-70 .457 Conversion

[802flyfish]

Picking up a Marlin 45-70. Debating on this .457 conversion. Can’t find much information on this conversion, but would be nice to shoot .410 for grouse while in bear country in MT/AK.

 

[std7mag]

I'd check with @p_ham!!

I don't know how a rifled barrel will do with the 410 in that long of a barrel.
I know that with my Taurus Judge with the 6" barrel, the paper is clean at 25 yards using #8 shot.
As in not a mark on it.

 

[p_ham]

I personally don't think it's worth the effort. Ballistic gains are marginal if any, and shotshells out of a rifled barrel are very short range.

 

[802flyfish]

Thanks for confirming.