I got a chance to shoot my .25 cal Disco today and test some .250" diam. cast bullets at 50 yards.... The gun is tuned for about 85 FPE depending on bullet weight.... I shot two 5 shot groups with each bullet from the bench.... My own cast bullets leave a lot to be desired, I was having problems with the sprue cutter bending the base of the bullet slightly, leaving one side of the base slightly rounded and the opposite with a sharp corner, so I didn't have a lot of hope for those, and sadly, they lived up to my expectations.... However, I had some (very expensive) Mr. HollowPoints, and while they shot better than my first effort, they weren't great either.... Here are the results for 5 shot groups, C-T-C, off the bench at 50 yards....

RCBS 57902 .25 ACP bullet, cast 0.251"-0.252" as 46.4 gr Hollowpoint shooting at about 900 fps, and 52.7 gr. Round Nose shooting at about 850 fps....

46.4 gr. HP Unsized: 2.25". 2.10"
46.4 gr. HP, Tumbled 10 min: 2.50", 2.15"
52.7 gr. Unsized: 1.85", 1.50"
52.7 gr. Sized to 0.250": 2.50", 2.20"

Mr. HollowPoint, 0.250", three different weights....

50.0 gr. @ ~880 fps: 1.45", 1.25"
52.0 gr.@ ~860 fps: 1.75", 1.00"
58.8 gr. @ ~810 fps: 2.75", 1.35"

Mr. Hollowpoint, 4 shot groups at 100 yards....

50.0 gr.: 2.25"
58.8 gr.: 2.90"

These results are significantly poorer than this gun delivers with JSB Kings, where it does nickle to quarter groups at 50 yards.... The barrel is a 0.470" OD Lothar Walther that I have had several years, I got it from Mountain Air and it's a good shooter.... I have three conclusions from todays testing....

1. If the base of your bullets doesn't look perfect, they won't be accurate....

2. Even if the base of your cast bullets looks "professionally done" they may not shoot as well as pellets....

3. I have a lot to learn about both casting boolits, and shooting them....

Bob