7.65 Argentine with Heavy Bullets

[Uncle Grinch]

I’m looking for a starting load for my 91 Argentine 7.65x53 with 216 FMJ bullets as I just acquired 250 of these bullets. Just want something to plink at the range. Got plenty of H4895, Varget, and H4831. I found some loads with N-203, but don’t have any of that.

[cwlongshot]

I shoot the Lyman 311284 hp mold in my 1909 7.65 with 2400 @ 1750+ and about 1.25" accuracy.

CW

[30calflash]

You might find something on an about that weight jac bullet load in the older Lyman manuals. IIRC Remington had a 215 gr corelokt that was used in their loads for 303, 7.65 and other 31 cal rifle rounds.

[Uncle Grinch]

I shoot the Lyman 311284 hp mold in my 1909 7.65 with 2400 @ 1750+ and about 1.25" accuracy.

CW

Thanks for the info. I’ve been shooting 314299 with decent results, but I’m looking for some jacketed load info.

[Kosh75287]

CONSULT WITH HODGDON about this, but if you can find data using the 215 gr. jacketed with H4895, then the 60% rule should apply. Ordinarily, I'd suggest "the load", 13.5/Red Dot, but the bullet you plan to use is ~50% heavier (and jacketed) than the bullet weight(s) anticipated for its use.
If you can find data for .308 Winchester, using 200 gr. cast and 2400, or maybe even one of the 4227s, I'd be tempted to try THAT in the slightly-larger 7.65x53 Mauser.

BTW, I'm unable to get data for ANYTHING from the hodgdon.com website. I don't know if that's b/c of things on my end or theirs.

[Kosh75287]

My 1971 EDITION of Lyman lists the following:

34.0 - 38.0/IMR 3031/215 gr. Jacketed --> 2000 - 2178 f/s
36.0 - 40.0/H4895/215 gr. Jacketed -----> 2036 - 2227 f/s

Keep in mind that these data are 50+ years old, when contemplating their use. There are other propellants listed, but they're all slower burning than H4895, so downloading is unwise.

OTHER stuff, came source:
9.5 - 12.5/Unique/214 gr. Lyman #311292: 1278 - 1492 f/s
19.0 - 22.0/2400/ " " " " 1633 - 1879 f/s
22.0 - 26.0/IMR-4227/ " " " 1715 - 1941 f/s

[Uncle Grinch]

Excellent Kosh75287!
That’s a great start. I also found a source that said I can use 303 British loads minus 5%.
Now if this rain and cold weather will let up…

[405grain]

I've never shot jacketed bullets through my 7.65x53 (and probably never will), but I'd like to second cwlongshot's recommendation on the Lyman 311284. I've been shooting a sporterized 1908 Brazilian Mauser with a 1909 Argentine barrel. I've been using the 311284, powder coated and sized to .312", with 23.0 grains of Buffalo Rifle (equivalent to AA5744). The accuracy is excellent.

[303Guy]

Load data for the 303 Brit will be similar since the case capacity is about the same as is the bore diameter. The throat could be different though so proceed with caution. If one looks at 174gr bullet data one can see how the two cartridges compare, load wise. Starting loads are the same it seems but check for yourself.

Have a look here.

http://www.adiworldclass.com.au/data-rifle/303-british

These are up to date data, showing a 215gr Remington bullet. You'll see that H4350 gives the highest velocity with the lowest pressure of the two powders listed. Varget start load is 37gr and H4350 start load is 42gr. You will have to extrapolate for H4830. I would suspect that the starting load would be a full case. The H4350 max load is already a full case and the pressure is a shade below 40,000 psi. Bear in mind the bullets you have are different.

I should mention that ADI make Hodgdon powders and call them differently. H4350 is 2209, Varget is 2208, H4895 is 2206H. The equivalents are shown in the ADI site.

https://bulletin.accurateshooter.com/2010/12/hodgdon-equivalents-for-adi-product-codes/

When they say equivalent, they mean it is exactly the same stuff. A small difference could be that Hodgdon powders produced by ADI are blended to reduce lot to lot variation while the ADI marketed stuff my not be - I don't know. No lot numbers are given on the cans. Not that I can find anyway.