230 gg JHP vs fmj data


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Steve H
March 9, 2008, 04:03 PM
I'm not finding a lot of data for the .45 ACP 230 JHP. Is it ok/wise to sub the FMJ loadind data (powder)?

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rcmodel
March 9, 2008, 04:08 PM
Except for Speer Gold-Dot's it should be O.K.

They use different data because they are plated, not jacketed.

But I can't understand why you are having any problem finding data.

Every reloading manual I own has dozens of loads for them.

Just get a reloading manual for the brand of bullets you intend to load and the data is there.

rcmodel

grendelbane
March 9, 2008, 06:08 PM
Warning! Warning! Will Robinson! Danger! Danger!

Which might be a little drastic, but, "Let's be careful out there!"

Seriously, the configuration of a jacketed hollow point is quite different from a full metal jacket bullet. The bullet will be longer, because the material missing from the hollow point has to be added to the base to maintain that 230 grain weight. Plus, the JHP is usually loaded a little shorter, further decreasing powder space.

I am not trying to be a "Nervous Nellie", but I do recommend starting low, and working your way up. If you have a chronograph, you will probably discover that you reach standard velocities before you reach the maximums listed for 230 grain FMJ. Now, velocity is not the same as pressure, but this is an indication of what is happening. Besides, JHP bullets work best in a fairly narrow velocity window, so you want to stay pretty well inside that window.

rcmodel
March 9, 2008, 07:00 PM
Well, that may be the case, but if you look at a Hornady reloading manual, they group the 230 XTP-HP, 230 Truncated, 230 FMJ-FP ENC, and 230 FMJ-RN all together.
And use the same exact load data for all four bullets.

But my first advice still stands.

Buy a reloading manual for the brand of bullets you are using.

rcmodel

Steve C
March 9, 2008, 07:08 PM
Alliant has data specific to the230gr JHP on their website:
http://www.alliantpowder.com/

rcmodel
March 9, 2008, 07:20 PM
Yea, but see, that's just a generic JHP. They don't say which brand, or shape, or whether it's a jacketed XTP, or a plated Gold-Dot.

If we are gonna quibble over JHP vis FMJ data, we can quibble over that too.

In my mind, it's no better data anyway unless they specify the brand of bullet used.

The other thing is, the "longer" JHP loads they list use heavier charges and higher pressures then the "shorter" FMJ!

So you probably wouldn't get in too much trouble using the FMJ load data with JHP bullets.

rcmodel

Walkalong
March 9, 2008, 07:21 PM
It's not that big a deal in .45 ACP, really. If you only have data for 230 JHP's and want to use a 230 FMJ, you will be just fine. Just don't start at max, like you are supposed to do anyway. Get a good reloading manual.

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