45 ACP lead vs. FMJ

clk

clk

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Just getting back into shooting, IPSC and realoading, after many years away. I have been shooting 45ACP revolver in IPSC. My loads are 4.4 grs Bullseye, Federal small pistol primer, 230 gr. round nose lead bullet.

I have no problem making major power with that combination. I have recently bought some 230 gr. RN jacketed bullets. I will work up the load to get the same power factor as my lead.

But my question is, does anyone have experience as to approximately how much more powder does it take to obtain the same velocity with jacketed bullets as you do with lead? I intend to load 4.6 grs and 4.8 grs of Bullseye over jacketed and see how they do.

Any opinions welcome.

Rod
 
Because of the variations found in revolvers, I think one would have to go on a gun by gun basis, rather than by rule of thumb. If possible conduct your experimentation over a chronograph. If your bore is on the large side, you might find the same load will produce similar velocities for both cast and jacketed bullets of the same weight. Fast powders combined with small cases can be dynamite, but your loads seem to be conservative enough not to create a problem for you.
 
.2-.4 increase will likely be a bit shy, but a great place to start. Like Boomer says, use a chonograph, all guns are different.
 
boomer and joe


Thanks for the info. I have used a chrono in the past and will do so in the next week or so, as I work up the loads on the FMJ.

Rod
 
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