You know it’s funny you mention that, the Jekyll and Hyde thing. Because I thought I had a load, good numbers small group. Went out and shot it, couldn’t hit the broadside of a Buck at 500 yards (literally). Went back to paper and it was all over the damn place.
Well that’s the thing. I shoot solids in my 6.5 and 375 ct and load dev went as smooth as leadcore. This 7PRC has me wondering about the gun itself
What’s your jump? I usually have good luck at around 50thou or further. Though, I haven’t tried any in the 7prc.
I am the least likely to know, as well. Your comment about a barrel settling in between 150 - 300 rounds makes me wonder if it has to do with getting some copper in the barrel. I have read that it is best to remove just carbon but let the copper reside, providing a smoother surface for travel of the bullet down the barrel.
Fair enough. Time to do some manual math and evaluation of these two statistics during barrel cooling. Since I can't drink a beer at the range, this will keep me busy!
Started at lands. Then jammed. Then 005 off, then 020, then 025, then 030. Driving me nuts. Haven’t tried that far off yet though
I usually start at 50 for monos and have always had great luck
Exactly... I made one run of 3 shots through that rifle, and that was it. And my drops in my dope-chart are perfect, too. I didn't cherry-pick a damn thing. I didn't shoot several different sets and pick that one to show. That would be disingenuous. I shot 3 shots, that's what the chrono spit out. But I'm not going to argue with someone over this. They can believe whatever they want to believe.
What aspect of the load combo do you think made it a pain? Bullet, barrel, powder?
All three of those. Started with a 168gr and it just didn’t want to shoot it. Maybe with a different powder it would have, but I only have what I have and you know how getting powder is. It was brought to my attention that it was probably a stability issue, so dropped down to next weight class of bullet. Again, maybe changing powder would have helped what was going on but I don’t know.
It depends on what weight projectiles you want to push. Retumbo will work for heavies, like 190 class. For lighter, try something else. H4831SC seems to get good results and velocity with lighter class clads and solids.
hawkinsprecision.com 
Oh I bet you can. N570 out runs all other powders in the 65prc with heavies, similar case capacity to bore ration. N570 does wonders in a 7mag, and it only holds a few more grains.
Well I'll give it a try when my new reamer arrives. I was running a 22" barrel so maybe that had something to do with it.
I am going to try N568 and H1000. RL26 is what I want to test with but can't find any.
From what I was reading, characterizing N568 may take a while longer. It apparently isn't all that close to n570 in enery density.
N568 is weird. Was advertised as short cut N570 but has way less energy. I tested it in a wildcat 257 similar to a Weatherby, and 300 norma. It would generate velocity similar to Retumbo and H1000, but required 2.5 to 3.5 more grains powder to do it, very high case fill though. It's not a high energy powder like N565 and N570.
I had pressure issues with some of my first factory loads also. The ELDM loads in particular. Check out the 7mm cartridge guide on long range only or on YouTube. My favorite load is with H4831SC. Good luck!
Depends. How much neck tension do you want and what's the neck thickness on your brass? I generally like .002 neck tension and my ADG brass thickness is right at .015 so I mostly use a 0.310.
My virgin ADG brass necks came in avg measuring .3095. Using a KM .0020 BT mandrel it pushed it out to .312. loaded 180eld measuring .313. I ordered a KM .0030 BT mandrel.
I like the looks of that. I hope I can find some N570 to try when I get my 18inch 7 PRC in a few months.
www.powdervalley.com That’s the exact reason haha
Hot Damn----Send some targets when you get shooting!
