6mm ppc

G

g n brezinski

Member
going through some old presion shooting magizines.saw a article onlapua brass in 220 that had loads and verolcitys on them using 322 powder.geza waS TESTING THE QUALITY OF THIS BRASS AS COMPARED TO OLD SAKO 220 CASES.MY QUSETION IS WHAT IS THE DIFFERANCE IF ANY AS FAR AS GROUP[ING ABILATY BETWEEN THEM.I HAVE BOTH TYPES..
 
All of that is just old technology. Nobody uses those Sako cases or H322 anymore, and back then Neck Sizing was the norm. Even new Lapua brass is improved over that old stuff. You can do all of that if you just want to play at the range, but in competitive circles it is light years behind.
 
The old Sako brass was a balloon head type case if I recall correct and will not withstand the pressures used nowadays with 133. They may be ok with loads around 27.8 grains of 322 but work up slowly. It has been many years since they were used in competition.
John
 
68 grain berger bullets

how would you start seating them into the rifleing?i have a hart barrel on gun.also getting bart bullets soon
 
I would go .003 at a time on go in off the lands. Jamming hard into the lands always raises the risk of pulling a bullet and dumping powder in the action. Not what you need when shooting a tiny little bug hole.
 
case necks

when neck turning how do you do it.i turned my cases 4 times to get .0085. on last turn i left them sit 24 hour then tuned them again at the lase setting as prescibed by stan BUTCHEL IN A ARTICLE IN PS MAGIZINE SEPT 1995.
 
There are lots of ways of doing it. With a .262 chamber turning to .0085 neck thickness I usually did it in 2 passes, .0095 to .010 on first and final to .0085. The current thinking with some shooters is to take a bit more off to make sure you have .002 -.003 clearance in the neck. .008 to .0082 will work well. Just make sure you get them nice and smooth by taking a little time with the process and not horsing them into the cutter and leaving a neck that looks like a miniature ploughed field.
 
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