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Old November 13, 2014, 01:27 PM   #1
Pond, James Pond
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Reloading to a virtually identical bullet?

Thinking of buying more of the PRVI Partisan .44 240gr jacket bullets that I bought before.

Same weight, same manufacturer, same shape (truncated cone). The only difference is I have loaded for the FMJ version and these are SJSPs.

My existing load is relatively warm (1350fps from 4", 20.5gr N110, standard LP primers), so I presume I should make some load adjustment before loading a stack of them.

So what, if any, load decrease would you recommend?

The standard 5% decrease?
Or a whole new load work up?
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Last edited by Pond, James Pond; November 13, 2014 at 01:38 PM.
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Old November 13, 2014, 02:36 PM   #2
emcon5
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If the bearing surface on the bullets is the same, and the powder charge is in the published safe range, I would probably just load 4 or 5 rounds and go try it and look for pressure signs.

Most manufacturers don't break up bullets by type in their load manuals, so it is most likely OK, but like I said, I would test a small batch to make sure.
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Old November 13, 2014, 02:55 PM   #3
Pond, James Pond
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Thanks for the insight. As for the published data: there was none!!

These were components that were thrown together due to what was available.

I may well try a few and see if the velocity is similar.
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Old November 13, 2014, 03:44 PM   #4
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What caliber is this for?
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Old November 13, 2014, 03:53 PM   #5
Pond, James Pond
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.44 Magnum
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Old November 13, 2014, 04:39 PM   #6
emcon5
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Well, Vihtavuori has 20.4 as a starting, and 22.1 as max for 240 gr Hornady,

http://www.vihtavuori.com/en/reloadi...n-magnum-.html

My Hornady manual (9th edition) shows a starting of 17.6 and a max of 21.3 for the same bullet.

My Sierra manual (5th edition) shows a starting load of 17.2 and a max of 20.2 for their 240 JHC.

So kind of all over the place.

If you are getting no pressure signs with your current load, I would try it with a few rounds and look for pressure signs and compare velocity.
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Old November 13, 2014, 05:03 PM   #7
Pond, James Pond
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Quote:
So kind of all over the place.
Pretty much the problem I have with all my reloading: just piecemeal data from here and there and I have to try and make an educated guess as to where to start and where to finish!!

I pulled back from 21gr as it was making 1310fps in cooold weather whereas the 20.5gr load was 1280 in the cold but jumped to 1345 in the warm. I did not want to shoot my hotter loads in warmer weather potentially hitting something like 1380 fps and 20.5gr is still a healthy velocity.

I had tried 21.5 in the cold and that matched my existing 20.5gr warm weather velocity, was a compressed load and did split one case, so I left that well alone.

The Redhawk can probably take it but why take the risk?
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