Four-Twelve

In the case of my Tolley, which is hitting in the neighborhood of five inches high at fifty yards, quicker internal ballistics would be tricky to achieve.

At this point, the rifle is printing very well (yet high) with 76gr Varget and a 350gr Hornady SNRN at about 2024FPS
That's through an 1880-something BPE rifle!
Mr. Wright shows a nice pressure-tested load of similar capacity in his book, with the 3-1/4" case, my cases are 500-450 3-1/2"
I've thought of nudging the charge up a bit to see if the groups would settle down to the sights, but since I'd heard of many other brit doubles printing like this my sense is to leave the load alone and craft a new front sight.

For what it's worth, my sight hold is with the bead down deep in the base of the shallow 'V' rear sight.

The only thing that's held me up on the fabrication of my new front sight is that the tiny screw that secures my front sight blade in it's dovetail is just a tad stuck.
Some time I'll get the penetrating oil and some vibration on that little bugger and get on with the build of a new plat-faced bead with a flip-up night bead.

--Tinker