This is my first post on this forum so I guess I'll go ahead and introduce myself I'm Sydney and I'm getting ready to order my first fully custom rifle. I'm leanig toward getting a 7mm Rem Mag with a Bartlein stainless 5R barrel with a 1:10 twist. What barrel length would be the best for shots upwards of 800yards? Most people are recommending anywhere from 22" - 26". What's the best that you've found?
I would go 1:9 twist and 26 to 28" length. While I have had no problems with stabilizing 162 A-Maxes in a 1:10 twist Hornady recommends a 1:9 or faster and it would leave you open to shoot the 180 Bergers also.
Welcome Sydney! I would go with a minimum of 26". You will increase velocity by approx. 40 ft/sec. for every inch of barrel length. If you intend to shoot long range and maintain sufficient energy, the extra velocity will help. You will also want to use a high B.C. bullet for the same reason. There are some good bullets available for that diameter. Hope this helps. Again, welcome!.......Rich
As long as you are going custom, you may want to consider the 7mm STW or the 7mm RUM. I have nothing against the 7mm Mag, but the ballistics are only marginally better than the 30-06. Both of these other alternatives will get you out to 1000 yds. and commercial ammo is readily available for both.