No1_49er wrote:Go here. https://www.6mmbr.com/6mmbr.html There's a "truck load" of info there.
No1_49er wrote:Go here. https://www.6mmbr.com/6mmbr.html There's a "truck load" of info there.
JohnV wrote:No1_49er wrote:Go here. https://www.6mmbr.com/6mmbr.html There's a "truck load" of info there.
You beat me too it , that's a good place to start .
He can still neck turn even if it's a standard neck chamber and get some benefit . You just have to know how to do it for a factory chamber as opposed to a tight neck chamber like yours . I have been using skim neck turning and partial neck sizing for some cartridges for decades and it does give a bit extra accuracy when you have tuned up everything else on the gun and looking for the best tuned ammo . I agree for a hunting rifle it's not a good idea to jam the projectile into the lands , better to just touch the lands because then you can extract an unfired round without risking pulling the projectile out .SCJ429 wrote:I have shot a lot of 105 and 90 grain Berger's from my 6mmBRs. Very forgiving case, fill her up with 2208 and shoot bug holes. For 105s you will probably end up a little over 31 grains and for 90s at middle to high 31 grain range. Of course my set up may be different to yours, I have a tight match chamber, I jam my projectiles into the lands. i neck turn Lapua cases and use CCI BR primers.
SCJ429 wrote:I have shot a lot of 105 and 90 grain Berger's from my 6mmBRs. Very forgiving case, fill her up with 2208 and shoot bug holes. For 105s you will probably end up a little over 31 grains and for 90s at middle to high 31 grain range. Of course my set up may be different to yours, I have a tight match chamber, I jam my projectiles into the lands. i neck turn Lapua cases and use CCI BR primers.
JohnV wrote:He can still neck turn even if it's a standard neck chamber and get some benefit . You just have to know how to do it for a factory chamber as opposed to a tight neck chamber like yours . I have been using skim neck turning and partial neck sizing for some cartridges for decades and it does give a bit extra accuracy when you have tuned up everything else on the gun and looking for the best tuned ammo . I agree for a hunting rifle it's not a good idea to jam the projectile into the lands , better to just touch the lands because then you can extract an unfired round without risking pulling the projectile out .SCJ429 wrote:I have shot a lot of 105 and 90 grain Berger's from my 6mmBRs. Very forgiving case, fill her up with 2208 and shoot bug holes. For 105s you will probably end up a little over 31 grains and for 90s at middle to high 31 grain range. Of course my set up may be different to yours, I have a tight match chamber, I jam my projectiles into the lands. i neck turn Lapua cases and use CCI BR primers.
This is how I partial neck size some of my cartridges and once you fire form them the first shot , then the slight second centering shoulder stays unsized , untouched , for the life of the case . This is achieved by using a body die and a separate neck sizing die . This is how you claim back the neck thickness after skim neck turning and have a more precision neck wall thickness . This is only for a bolt action and gentle feeding .
SCJ429 wrote:I have used 450 Magnum primers, same cup thickness as the BR primer. Just do a ladder test until you cannot fit anymore powder in the case, even using a drop tube and lots of tapping you should be fine with 2208. I have never noticed Magnum primers give me any more pressure or speed, in other cases they can improve the ES. Not every time and for the BR case I find the CCI BR primers give me the best results. You have to see what works for you.
The best barrel I ever had was a Maddco. I hope yours is awesome too. Just a dozen rounds should settle the barrel in, it doubt it will have much copper fouling for you to clean out. Full power loads are fine. Then do your ladder test to see what she likes and tune from there. As I said before, you will probably end up at about 31 grains for your 105s. I have never used a Berger hunting bullet, only match bullets and their shape and bearing surface may be slightly different.
SCJ429 wrote:Oh, and don't coat your bullets with anything especially Moly.... No matter what cool photos John shows you.
SCJ429 wrote:Oh, and don't coat your bullets with anything especially Moly.... No matter what cool photos John shows you.
SCJ429 wrote:You need to do your own research regarding coated bullets but the best indication is go to a National Competition and see how many guys use Moly, and that will be none.