Again, my memory could be all f_cked up, but I'm dead certain my buddy didn't take the course or the test. I'm certain he would not have passed - not because he had safety issues, but he has intellectual issues. BUt, this has nothing to do with 2 1/2 inch shells in a 2 3/4 chamber. Also, it seemed to me that the chambers were actually 2 9/16 (Google seems to confirm that), and I measured a few fired 2 3/4" I had, and they are just shy of 2 3/4. You're talking less than 5/64" difference - I'm pretty sure if the gun is nitro proofed, and you stick to target or upland loads, you should be OK. I know I wouldn't be afraid to try it if the gun was solid and the chamber actually is 2 9/16. And, if you reload, you could trim that 1/16 or so just to be on the safe side.