colorado:
My .577 on the Greener 'Empire' shotgun was built by sleeving new barrels, in the proper meaning of the term 'sleeving', ie lopping the old shotgun tubes in front of the barrel flats, what is often called a 'monobloc', and fitting the rifled barrels. It was then regulated in the normal manner, before laying the ribs.

It has newly manufactured ribs and sights, only a single standing rear sight. Part of the old rib containing the Greener address banner was used in the new quarter-rib. As I have pointed out before, the trajectory of the 650gr Woodleigh at 1650 fps does not deviate more than one inch from the line of sight out to beyond 100 yards, and is only 6 inches low at 150 yards, if sighted dead-on at 90 yards. Try it in your favourite ballistics software program and see for yourself! No flip-up sights needed for this type of cartridge, which is essentially close range anyway.

I will photograph the sights and toss them up as soon as I can.