Some I have used:

Mauser 96 - I own one;
Mauser 98 - I own several sporters and one mil;
.303 No.1 Mk III SMLEs - Own two, one full and one cutback;

m16 - have shot one as a tourist in Vietnam;
Ak-47 - ditto in Vietnam and Cambodia. Used to have a semi auto SKK. Chinese mil rifle.

Never used a Sharps carbine, Henry LA, Garand, M14, AK-74, M4, HK416, and unfortunately not an SLR or FAL. Couldn't care less about never using an SA80!

HAVE used a Martini-Henry!