7mm Benchrest accuracy questions

[crustyrusty]

I have just read up on here this forum alot of information about what makes the 22 bench rest accurate and 6mm bench rest super accurate .... I tried to find information about the 7mm BR but not much said. the only information I have found is the reloading data that was in Frank C Barnes Cartridges of the World and the data that hodgdon has and the data that's on Load Data .com but they all fail to give hints at to what load may be better suited over a different load. My rifle is just about done all it needs is to have the barrel crowned and then have the action bedded to the stock,, so they promised that I will have it in my hands on the sept 11th.... so I am very anxious as to how this build will perform... when I got the reamer It was a full SAAMI spec reamer I didnt change a thing,,, I was gonna change the neck diameter then chickened out thinking I might upset the cart..so I just got done neck turning all of my converted cases to .308 neck and all of my 7mm BR cases are at .309. and all of my 6mm BR norma cases necked up to 7mm are at .309 so what are some of the ins and outs of the 7mm br? what makes them burp? what makes them go like a scalded dog?

 

[Kurz]

You don't say what the intended use is for this rifle and cartridge. You don't specify a weight range for bullets or the twist rate.

but they all fail to give hints at to what load may be better suited over a different load.

There is nothing surprising about this at all. Most rifles are completely different as to what components perform the best in specific rifles under specific circumstances. That's the point of testing. Otherwise there could be one or two magic loads which would work for everyone. The exception is the modern 6PPC which usually calls for 68 grain Match bullets and VVN-133. It's kind of like NASCAR at this point in time. This is also a sales tool since they don't select just one load but allow you the opportunity to test several components for the potential best loads.

Nosler marks the accuracy load in it's published tables but they may not feature the 7mmBR.

 

[crustyrusty]

the twist rate is 1-9 twist in a wilson tube ,,i am going to run with bullets that at are 100gr , 110gr , 115gr ,120 gr, 130gr , 139gr ,140gr ,and 150gr
my intended purpose of this round is paper punching and ringing steel and taking it with me to Texas and harvesting a hog or 2