Hi, just my 2c again. I agree with Ithaca. Your guns can more than likely take it as he said. American doubles as a rule have much thicker bbl walls than Brit guns and pressures can be higher in American guns, but why subject your gun to more punishment than needed.

Also, I'd check your chamber lengths, they may have been punched out or they are short chambers to begin with. That can have a bearing also. American guns aren't my forte, so I'm sure someone with much more knowledge will step in.

Good Luck!

Greg

Gregory J. Westberg
MSG, USA
Ret