Still working on a Mauser load

[jimb16]

I've gotten a nice NOE 8mm mold that throws a 190 gr plain base spire point. I PC it and the final weight is around 195 gr. I size to .323. I've tried several different powders. Right now I'm working with IMR 4895. It seems that the higher I go with the powder charge, the tighter the groups get! I started at a minimum load and worked up to 32.1 gr. Out of my Yugo M27 I've gotten the groups down to 3 inches at 100 with an occasional flier that opens the groups to just over 4 inches. I spent today loading another batch increasing the charge weight by .2 gr increments. I'll probably finish tomorrow at around 35.0 gr. I'm hoping to find the sweet spot soon. It would be nice if I could get those groups down under 2 inches. I'll chrono the best loads once I find what seems to work the best. So far IMR 4895 just seems to work better than anything else I've tried. I'll probably try a couple more powders after this; IMR 4064 and IMR 4350. Any suggestions for those two powders?

[3006guns]

I've been playing with an old Lyman 214 grain 8mm mold (don't remember the number offhand), along with a variation of "the load". 17 grains of 2400 makes a modestly stout cast load that is accurate and hits like a sledgehammer at any reasonable range. So far, it has performed well in a Gewer 98, Yugo 48 and a Commission Carbine.

I haven't tried any "real" rifle powders yet, so your information is definitely of interest!

[RU shooter]

Maybe try sizing to .324 or larger as most milsurp 8mm's have generous throats . Food for thought you maybe exceeding the limits of that plain base bullet, PC still isn't a gas check, maybe try a slower powder ?

[jimb16]

" maybe try a slower powder ?"

That's why I'm asking about 4350. That is a whole lot slower. Anyone try it for cast bullets?

[oldblinddog]

I don't consider IMR 4350 to be a "slow" powder. Slow starts at IMR 4831. However, for IMR 4350 start about 37.0 grs and work up. Also, as has already been said, size your bullets larger.

[Kosh75287]

It seems that I recall a "75% rule" for IMR-4064, wherein you reduce the max charge for the bullet weight of interest to no less than 75% of max. I doubt that Hodgdon endorses this, but I have had it recommended to me more than once by more knowledgeable reloaders. I will probably try it in my Vz-24 with the 205gr. pc projectiles I bought from Missouri Bullets.

I doubt that I would try the above with powders slower than Varget. I don't think I could be compelled to try it with anything as slow as 4831, at least not without tufting and/or deep(er) bullet seating. Other more experienced reloaders may (probably) know things that I don't about reduced loads with slow-burning powders. I feel like I can get myself into sufficient trouble with the medium-burning variety.

[dogmower]

my mauser really likes imr 4198

[jimb16]

.325 sizing die should be here in a couple days. May have to beagle the mold.

[Shiloh]

.325 sizing die should be here in a couple days. May have to beagle the mold.

Size at .325 and call it good. .325 will be al you will need.

Shiloh

[747 captain]

I use Lyman 165 gr sized .325 with 2400 powder

[RogerDat]

I use the Lee bore rider design and will have to check on powder but am pretty sure I load those with 4198. Was mild 100 meter target round but decent accuracy and not at all unpleasant to shoot. More accurate than store bought copper jacket spire points that had a noticeably harsher recoil.

This mold but I will say I also like NOE molds and they did have more 8mm choices https://www.titanreloading.com/lee-p...75-1r-mold-dc-