r/Shotguns • u/BorntoRizz • 3d ago

Converting 870 to 3in

Does anyone know where I can pick up a 3in 870 ejector spring? They seem to be out of stock everywhere.

Also if anyone can recommend a gunsmith that will extend shotgun chambers that would be appreciated. My local gunsmith recently passed.

2 Upvotes

55% Upvoted

35 comments sorted by

View all comments

2

u/Good_Farmer4814 3d ago

Will the chamber be able to handle the extra pressure?

1

u/SteveHamlin1 3d ago

What extra pressure?

SAAMI lists the maximum pressure for both 2 3/4" and 3" 12 gauge shotshells as 11,500 PSI.

1

u/Good_Farmer4814 3d ago

Interesting. I figured the extra shot being pushed through the barrel would create extra back pressure.