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 Post subject: More 8x50R data
PostPosted: Tue Aug 07, 2007 8:59 pm 
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Lance Cpl
Lance Cpl
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Joined: Sun Aug 05, 2007 1:29 am
Posts: 16
gschwertley
(11/26/05 11:41 pm)


The experiments with this caliber continue.

185 gr. Remington spire point (bulk bullet) .323
42.0 gr. IMR 4350
CCI 250 mag primer
Cut-down & reformed military 8x56R case (boxer primer conversion)
Avg. muz. velocity 1398
Standard deviation 16.97

205 gr. Hornady spire point .330
42.0 gr. IMR 4350
CCI 250 mag primer
Cut-down and reformed Graf 7.62x54R case
Avg. muz. vel. 1423
Std. dev. 25.62

Compare the data above to that of "Old Western Scrounger" brand of custom-made 8x50R ammo with a 220 grain bullet, below:

Avg. muz. velocity 1854
Standard deviation 12.54

The Old Western Scrounger ammo has respectible velocity (for this caliber and bullet weight) and a good spread. This ammo is no longer being sold. The comparison shows me that I have a way to go to duplicate the OWS performance because I have been conservative. On the other hand, this is never a bad idea when you are experimenting with loads. I will disassemble one of the OWS loads to "see what I can see."

When using the pointed bullets in loading 8x50R, they often do not feed well. The rifles re-worked to shoot 8x56R have modifications made to the ramping in the receiver to take care of this. Long, round-nose lead bullets feed fine in the 8x50R, but heavy, round nose jacketed bullets are difficult to find in 8mm (.323). Some time soon, I will try 170 gr. RN jacketed bullets for feed. See my previous notes on reloading this caliber as to why you can use .323 or .329/.330 bullets in this rifle.

"Sehr schwer, mein Herr"

_________________
"You cannot invade mainland United States. There would be a rifle behind each blade of grass." - Admiral Yamamoto - Japan, 1941 Image


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