Greetings, about a month ago I picked up one of these; Cimarron 7th Cavalry 1873 Reproduction .45 Colt w/7.50” barrel http://www.cimarron-firearms.com/mi...in-45-colt-standard-blue-uberti-ca514m00.html Sorry I don't have a real pic... but you get the point. Well I was back at the range testing out this revolver and some ammo I made up for it and here is what I came up with. Just for comparison; Buffalo Bore 45 Colt (Long Colt) factory ammunition 255 Grain Lead Keith-Type Semi-Wadcutter Gas Check Velocity – Box listed @ 1,000 fps/my 6 shot avg = 954.2 fps Standard Deviation – 23.25009 OAL – 1.590” Primer – Winchester WLP Bullet - 255g LSWC “Elmer Keith style” (Missouri Bullet Co.) Bullet length/DIA - .690”/.452” Brinell Hardness Number (BHN) - 18 Powder – Winchester 231 Powder burn rate - #29 (Hodgdon) Powder range – 6.5g up to 7.2g (Lyman Reloading Handbook 49th Edition) Pressure range – 6.5g @ 797 psi up to 7.2g @ 13,500 psi (max is considered to be 14,000 psi) Test charges - 6.6g - 6.8g - 7.0g and 7.2g Bullet seating OAL - 1.575" (Lyman tested length) Test gun – Cimarron 7th Cavalry 1873 Reproduction .45 Colt w/7.50” barrel It was (up here anyway) partly sunny day @ 62 degrees. Although this is a long barrel revolver, I have chosen to use a faster burning powder - W231. I have chosen this powder because it showed up in almost all of my load manuals & data reports and I have used W231 in many calibers over the years and pretty much know what to expect. Velocity numbers; 6.6g = 739.2 fps/Standard Deviation = 24.28511 6.8g = 763.7 fps/Standard Deviation = 29.08794 7.0g = 802 fps/Standard Deviation = 18.68689 7.2g = 822.2 fps/Standard Deviation = 20.57682 No sign of excess pressure, over burn only on half of the 7.2g charges (out side of the spent casings). Accuracy was tested from a seated/gun rest & standing free hand positions at 7 and 15 yards. All rounds fired without any problems. Accuracy was a bit of a toss up, all rounds were in tight at both distances. The widest group was from the charge of 7.0g @ 15 yards and was 4" and that was from my "free hand" position. I'll have to get into this more before I can declare a winner. Very nice load(s) all charges were easy to fire and control even the max load of 7.2 was handled very well by this revolver. The gun itself... what a Champ! very easy trigger, the sights - top of the front stem to the top of the rear grove puts you right on the center red dot of the target every time. The Keith style LWC were easy to load, shoot and with excellent results - nice clean round holes in the paper. If anyone has any other bullet/powder that you would like to recommend, but all means let me know. All in all are really fun old school revolver to shoot. Have fun and be safe out there Wanna kill these ads? We can help!