It's a bit like any factory ammo. A good accurate load will tend to work well in most rifles, and an accurate rifle will tend work well with most ammo. Use a ladder test and pick a node where several slightly different loads all group together and chances are that will be pretty tolerant of different rifles.Thank you again, everyone. Extremely useful information.
Now another (probably stupid) question: how likely is it that a load that works in a 20” barrel will also work in a 26” barrel?
The only reason it think it’s not a completely stupid question is that the factory Precision Hunter 143gr groups very well in both guns, so at least theoretically it seems like a single load could work in both.
Double base powders have added Nitroglycerin whereas Single base are Nitrocellulose only. DB powders burn quicker than SB powders which produces a faster rise (peak) pressure. The high temperature causes the erosion. The longer that high temp' is maintained the more erosion occurs. Pretty much all modern DB powders are treated to inhibit their burn temperature, which makes them 'dirtier' than SB powders and are no more likely to cause throat erosion than SB.Just noticed written somewhere, that all Rel. powders are double based, and all Ball powders are double based. People keep saying that double based powders are barrel burners, but is this so ? A lot of the more modern ones have " inhibitors" in them that are supposed to overcome this problem . Can someone update me on the reality please.