Thanks for the pics! That round ball fragment is much smaller than we used to find from steel plates hit with 44 C&B loads. We did not find any frags from my 255 grain Remington, 4,0 grain Green Dot loads, nor did we expect any given the pattern of fragments hitting the ground under the targets -- I was surprised. There may be still another important variable active here -- at those club ranges where I used 44 C&Bs extensively some years ago and were we kept seeing lead "silver dollars", all the steel plates were angled backwards at bottom and attached by "elastic covered" bolts, all done to reduce back splatter very effectively. Your ram is a heavy, solid target and the plates at range we shot at yesterday are simply hanging, heavy plates -- suspect there is a different behavior of targets when hit, certainly, that 55-60 pound ram is not moving much initially.
Unfortunately, I have no additional data. The large, tall, backward falling (hinged at base) pistol targets are now all being used as shotgun knockdowns that toss clays in various directions (they do a really wonderful job because of their weight!!). For this they are not calibrated with either standard 38 Special 158 grain loads or with a spring gauge. Because of this lack of calibration, I saw no real value in comparing the three revolver loads I used yesterday -- no reliable way to relate results to real CAS shooting conditions.
Had a great day CAS shooting yesterday, lots of nice flying and tossed up clays, as well as swingers and bottle/plate racks and great weather. This is only second time we have shot this year (we only shot once all last year). Both my 255 grain Remington + 4,0 grains Green Dot (328 fps) and 118 grain 0,315 diameter + 11,0 grains weight 777 FFg load (770 fps) in Swedish 7,5 Nagant revolver knocked the bottle rack targets down with finality. That 7,5 Nagant load is nearly identical to 32-20 standard velocity loads in 4,5 inch revolvers from early 1900s, such as Colt New Service and New Police. One miss with shotgun and two with rifle (first time I have shot rifle right handed in about two years, thanks to failing eyesight). Was Stina's best day ever.
Loaded up batch of 255 grain Remington bullets with 5,0 grains of Green Dot in 45 S&W cases -- hope they will group nicely at 50 meters.