kdrogers71775
Well-Known Member
Its probably low 90%s. Its definitely not compressed very much if at all. I think berger shows it around 92% case capacity at around 58-59 grains.
That seems slow, I'm getting 2820 out of my 260 with a 140 hybrid and 3045 out of my 260ai with a lot less powder.My modest & low budget expectations for engaging targets up to 1,000 with my 8 twist 6.5 PRC & 6.5-06 will use the 140 Hornady ELDM bullets @ 2775 -2825 fps with 57.5 - 58.0 grains of Staball HD & CCI 34 primers. I am concerned with brass life & bolt thrust.
I will also use 6.5 147 Hornady ELDM bullets.
These bullets have pointy plastic tips & provide adequate Sg values using slower twists than long pointy open point bullets - Miller stuff indicates adequate Sg's with 8 twist. Hornady 4DOF indicates adequate stability with 8 twist using 140 & 147 ELDM's.
I have a modest amount of SB HD & Hornady 6.5 PRC brass & my LGS sells both. I hope to shoot milk carton size (1/2 gallon size & smaller) rodents at extended ranges. Real good accuracy, 4 in same hole & 1 almost touching at 100 for numerous groups. Extreme spreads less than 20 fps.
Use of Hornady ELDM & ELDX bullets might be indicated with an 8-twist barrel. I can provide Sg values with the pointy plastic tip Hornady bullets.
If I had to drop a big tough target I would use my .300 WM with 200 grain bullets.
560 should get you more velocity over 565 and 568. 570 is faster by 50fps and more. I'll be shooting 150smk's from 264wm 7.5T. I know 26Nosler and 6.5x300wby (or improved versions will get you there faster), but stayed with the all-time favorite cartridge since '76 (11 yo).N565 has far exceeded RL26 in my 6.5PRC. They say N568 and N570 are possibly even better but i havent tried them yet. N565 gave me 150-200 fps more than RL26. N565 has brought my rifle to life. Finally
Yep. 2900 is less than I get with a 18" barrel2900 in the prc is pretty mild for a 140 grn bullet. But thats the joy of handloads......they are loaded to your liking.