Velocities- cast vs. "J"

[Beaverhunter2]

I'm not sure if this thread belongs in Favorite Loads or here but since the key point is Velocities between boolits and bullets (J-type) I figured I'd go with this page.

I tried 11 different loads in my SRH .480 Ruger over the weekend. The two most accurate were:

BA Bore 370 GR HPGC, Speed Green, CCI350, 25.0gr W296. Got about a 2.5" 6 shot group at 35 yds (I stink with pistols!) Velocities:

1260
1250
1251

The other most accurate load was:

Speer 325gr GDFP (found some on the shelf from when I first got the pistol and didn't have any .476 molds yet), CCI-350, W296 25.0gr. 2" group Velocities:

1220
1240
1257

My point is with the same load (except the boolit/bullet) Cast allowed a 14% increase in projectile weight with no loss in velocity! (Actually there was a very slight increase! )

Pretty cool!

John

[MBTcustom]

Cast shoots faster than jacketed. Seems backward from what you would think, but that's the way it works.

[stubert]

Alot less friction with cast than a jacket. Same charge, higher velocity.

[Harter66]

7x6.8 Rem
120 spire point Sierra flat base average 2210 RL 10x
27-130 patched sized 286 true weight 135 gr same load 2230.

32 Rem
The book says 170 jacketed max load of IMR 4350 is good for 2130
3 grains under start the Lee 323-170 plain based hit 2180.

45 Colts well that just got to be too much before to shoot before I got to jacket load maximums. In a Blackhawk no less.