Originally Posted By: GaryO
These chambers are a confirmed 2 3/4".


The chambers may be confirmed as currently being 2-3/4" but the question is was the gun built with them or, more likely, 2-1/2" chambers which were lengthened.

If the gun was proofed for 2-3/4" chambers there will usually be a marking on the flats of "70mm" (2-3/4"). If there's no marking on the flats it was built with 65mm (2-1/2") chambers and you should use the lighter ammo.

My problem lies in reconciling my gross habits with my net income.
- Errol Flynn