8x57 irs

The quickest way to get it is to full-length resize 444 Marlin brass. One pass through the die and you're in business! :)

I have used 444 Marlin to make 7X57R and 8X57R for at least 25 years.

Ted
 
thanks, been trying to help a family member find ammo for his new merkel sxs rifle and as you know finding ammo and brass is quite a chore. anything you guys could share would be helpfull
 
Screw the sizing die down until it touches the shell holder, then back the die out about half a turn. A regular 8X57 die works perfectly, as the only difference is the rim.

Be sure to lube the inside of the case neck, as well the outside of the case.

Resize the brass in the die and try it in the rifle. It will not likely close on the case, as the brass will not be fully sized for the chamber yet.

Turn the die a bit further down and try again. Do this until the rifle closes on the brass.

Once you get the die set properly, lock it in place. You are now ready to resize all the brass.

Now, the first time you size all the brass, partially back out and rotate the brass 180 degrees in the shell holder, and run it all the way back into the die again. This will insure that it is sized properly and you will have no trouble chambering it in the rifle. You only need to do this on the initial reforming.

Let us know how you make out.

Ted
 
There was a dicussion on Graybeardoutdoors, in the drilling,combo gun thread. A senior member remarked that there was a difference in RIM THICKNESS for the 8 x 57 of either the jr or jrs loading.

My 7 x 57R BRNO 304 has the same rim thickness as .444 (.444 to 7 x 57R worked for the 8 x 57 step, but the next move to 7 x 57 left wrinkles at the neck.)

Before you stretch a good old gun check out the rim thickness. I believe that a .303 Brit case might do as a gauge, if you don't have a gunsmith handy.
 
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