Looking forward to your results. Intrigued by the case...
6.5-7mm prc
- Thread starter scottw2119
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Huntnful
Well-Known Member
Me too! It'll be a few days before I'll test it, with work and a week long storm starting tomorrow here.
260shooter
Well-Known Member
I have a 6.5/7 PRC and run 147 ELD-M's at 3100 fps (3077 @ 25 degrees) in a 22" 8 twist, using 68.2 grs of H-1000 and Fed 210M primers in ADG brass.
While doing a ladder test anything over 66.0 grs gave low single digit SD's.
Will.284
Well-Known Member
I've been looking at the6.5/7PRC myself. Thanks for this info , pretty much made up my mind !!
Huntnful
Well-Known Member
Oh that's excellent info!
I have ADG brass and using 210M's as well. I used a .290 bushing and necked it down in one step, and the expanded with a .263 mandrel.
Here's a 140 hybrid target touching the lands in a .180 freebore.
I seated .020 off for the pressure testing and shooting the barrel in a little initially.
260shooter
Well-Known Member
My guess is it will set up and beg biscuits off the table at around 69.0 grs of H-1000.
That is great info on the freebore length. do you know the reamer spec as far as freebore diameter? It makes a difference getting to the lands. Is it .2645 or .2650 or ? Does anyone else have any reamer specs to share? any info appreciated. I need to get a reamer ordered.
Huntnful
Well-Known Member
I have no idea honestly. High Voltage Armory has the reamer and did the build.
I would be careful with that 70 grain charge. My 264 is throated long and I run into pressure around 71 grains of Retumbo with 140s. The 264 case has a bit more case capacity than the 7 PRC case.
scottw2119
Well-Known Member
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My reamer was set up for the 156 and the ones I have built all liked the n565 and was pushing the 156 right at that 3200 mark.
Really thinking about doing this with a 18" bartlein 7.5 twist... Have plenty of ADG brass, N565 and all I'd need is a bushing for the SAC 7PRC die. 3,000 with a 156?
Coercionist
Well-Known Member
Such an impressive speed with the short barrel, what type of velocity does a 30" barrel typically give? (with slow enough powders) Im hoping for a max of 3300 and to find a node at 3200.
I have a very accurate node at 3209 with a 24.5" barrel.
156 EOL Hybrid, N-560, 215M, 3.350coal.
N-565 will be very similar.
I max out at 3324fps.
A 26" barrel will easily run 156's at 3200fps.
Hope this helps.
EDIT: scottw2119 built my rifle, and did a Great Job.
