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velocity based case sorting

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Unread 09-20-2004, 05:56 PM
Platinum Member
Join Date: Dec 2001
Posts: 1,013
Re: velocity based case sorting

I load at the range and have done that with a 300wsm factory rifle got a veocity spread of 16fps on 3 rds that was with H-4350 got alot more using R-19 and R-22. On my 6.5x284 using once fired cases Win 284,Hornady 6.5x284 and laupa 6.5x284 the spread was about 24fps once got velocity down to the 2900fps range. The spread I'm using is between high and low velocity. Since I'm not into the long range game ES and SD doesn't help for my type of shooting. I fired form some 7x57AI case using RWS brass and those were the most unifrom as to velocity less than 5fps on 5 rds. About 20 yrs ago had a tight neck 6x284 built with a 1/14 twist 30" barrel want to shoot some berger 68gr match bullets over 4000fps got over 4200fps had a velocity spread about 40/50fps backed the load down till groups started to open up and settled on that load so checked velocity was alittle over 3850fps and spread was cut in half had the same thing happen with my custom 300wsm with that 5r barrel was pretty close to 3300fps with a 165 gr bullet got down to alittle over 3100fps. I've got a tight neck 6br and a 6br shortentalldog gets better velocity less velocity spread and better groups with the shorten 6br than the standard 6br. I've got a tight neck 308 that I'm going to start shooting one of these days its set up for the 168gr match bullets all I've managed to get done is some brass turned. When I started to shoot BR I would start out with about 60 cases and get maybe 30 for match and use those till got a new barrel and if was lucky might use those cases on the next barrel. I've still got a 100 of the old Sako 220 Russian case and afew that Skip Otto put in the new bushing for the primer pockets. Well good luck.
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Unread 09-20-2004, 06:01 PM
Gold Member
Join Date: Jan 2002
Location: Wenatchee, WA
Posts: 806
Re: velocity based case sorting

You first, man. [img]images/icons/grin.gif[/img]

That's why I posted here, to see if anyone else had been fooling with it.

Actually, once I get done w/ the other 300 or so of my ~500 cases of 6.5-08 (3rd firing, now it's time for trim, chamfer, debur, uniform the primer pocket, general inspection, etc.) I'll be ready to get back into experimenting. But it's slow going w/o a Gracey or Giraud to do the grunt work; I've got a Wilson trimmer and all the other stuff I chuck in a drill press. Still takes time, though.

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Unread 09-22-2004, 12:48 PM
Writers Guild
Join Date: Jul 2001
Posts: 1,459
Re: velocity based case sorting

Monte, do all testing with fireformed case. Fresh out of the bag, there is too much variations to matter.

so I fireform, then load for accuracy testing, then confirm either through accuracy testing or on LR targets/gongs. At least I get some 'shooting' while I am sorting brass.

I find that if a lot of brass shoots well, I don't need to sort every single piece. But, I don't shoot 200m BR where a tenth is too much.

Anyways, have fun with your testing. The bullet, powder, and brass companies thank you for their new retirement cabin.

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