Re: 7mm JRS, 280 RCBS Imp, 280 Gibbs
I built 3-4 7mm JRS several years ago and I know a couple of those guys have shot the daylights out of them with no barrel problems. Mine has probably 750 rounds through it and has no problem. I know they have shot their rifles more than 750 rounds. Barrle life would be quite a bit more than a 7 rem mag for sure. But I have never worn one out so do not have a difinitive number for you. I love the round because it will do everything a 7 rem mag will do with less powder, noise and recoil. I never could figure why it didn't gain more popularity. I will look tonite for more info for you. Very easy to make cases and reload. I looked up some data for you. 66 grains of 7828 pushes a 140 grain bullet 3220 fps out of a 26" barrel. One of my best hunting loads with it is the 150 grain swift scirroco at 3140 fps with 64.5 grains of 7828. These were a couple of my accuracy loads with CCI 250 primers.
Predictions are difficult, especially when they involve the future