Howdy,
Ten-X is great ammo. They helped Taylor's with the development of the modern 56-50 for Armisport. I used their ammo (as well as my reloads) in the article I wrote for the cowboy Chronicle about the 56-50 Taylor's. Here is an excerpt from my original draft:
...Loads Used:
1) 37.5 grains (volume) Triple 7 w/ 350 grn, .512 diameter Ken’s Ten-X bullet: Starline brass,
CCI Magnum Rifle Primer (about 1,250 fps)
2) KEN’S TEN-X 350 grain Smokeless (about 1,300 fps)
3) KEN’S TEN-X 350 grain Black Powder Substitute (about 1,100 fps)
At The Range:
I managed to break free from about 20+ hours of work on the ranch one weekend and shoot the Taylor's Spencer 56-50 for the first time. I used Ken's TEN-X loads and my BP substitute (Triple 7) loads. I set up at 25 yards, as I have lost my spectacles and can't see well at distances without them. It would not be a fair test. The first groups were uniformly to the left, so I adjusted the rear sight for windage. After I got the Spencer dialed in, I shot for group size.
Ken's BP substitute loads were fairly tame. The best group I got with them was a 1 1/4" group, dead on point of aim at 25 yards. His smokeless loads were noticeably stiffer, but shot a decent 1 3/4" group, though they shot about 2-3" left of the BP substitute loads, but at the same level.
My Triple 7 loads were the best. The Best group with them was 1" center to center, 2" above point of aim, dead in the middle of the bulls-eye. They were as stout as the smokeless, but no signs of excessive
pressure.
This is fairly decent, as the trigger pull is about 9-10 lbs and the sun was just starting to shine into my eyes. All of these loads were good enough for close in. When I get a new pair of glasses, I will try it at 50 and 100 yards. The only modification I made prior to shooting was to open the rear sight up a might for a faster acquisition of sight picture.....
...I then used the Spencer in single shot mode for the Plainsmen event, shooting clean. I single loaded each shot from the top, al-la 1870's cavalry style. In the Plainsman Match, I used Ken's Ten-X BP loads. I also used the 56-50 Taylors as a main match rifle (with the posse leader's blessing) on several stages, also shooting clean. It was a great week-end for Taylor’s .56-50 Spencers!