It's been proven time and time again...you can shoot appropriate 2 3/4 low pressure shells in guns with 2 1/2 chambers. Chamber pressure is increased very little. Read the Sherman Bell article. I've been shooting 2 3/4 shells in my 2 1/2 guns for over 30 years. If you are a purest, then cut down the 2 3/4 shells. Either way you are going to end up reloading unless you can find RST's or some other retail offering. Don't lengthen your chambers!

"As for me and my house we will shoot Damascus!"