I have a 1882 Remington 10ga, but believe the chambers are 2 3/4 after carful measurement. Either way, the shells are cut to what ever length you want. JMHO, but any mild primer will work - Rem, Win, Cheddite, or CCI. The 10ga wads from BPI are cheaper than the Remington wads and work fine. The soft 16ga 1/2" cushion wads work best for taking up space. They can be cut to whatever height you want for a good crimp. Patrick, I have a extra 50 Win 10ga once fired hulls you can have for let's say 7/8$ plus shipping. Let me know at
bladesmith46@hotmail.com. Title the message " 10ga ".