That might help, if teh guardwas to the rear of the front of teh cylinder. With the wedge, barrel, and loading lever all offering teh possibility of ricochets, I'd still be careful. I recently read a review of a riplica Colt revolving rifle, which also warned of teh possibility of injury during a chain fire incident. It wasn't just the lack of grease, but nipples could cross fire if a cap fell off from recoil.
Off the subject, but I fired a .31 Manhatten Pocket Pistol(contemporary knock-off of the '49 Colt Pocket Model)at an oak board several years ago. It ricocheted rather forcefully and the ball hit me in the shoulder. Luckily, I had on a field jacket and flannel shirt, so I only got a very sore bruise. I still have a keloid scar where I was hit. It hurt like hell, but certainly not like teh Minie' ball that hit my great uncle Francis at Spottsylvania. THAT ball broke his shoulder blade and exited near his spine.