Thread: Breaking in the 260rem and load development

Thank you GPM, that’s the feedback I’m looking for. The ADI manual confirms your Hodgson data at 42.7gns max. It’s been awhile since loading so questioning where I got the 44.5 max figure from?? Maybe why I stopped at 42.5. It doesn’t feel as stout as the Hornady factory ammo but if those velocity figures standup then I’ll be more than happy sitting where it’s at. I want to push this rifle out as far as it can so definitely need to chrony it at first opportunity. As you suggested, the 129sst’s were a great place to start so very happy given that it really did not like both types of factory ammo I’ve run through it.
Next step at this stage is to run a five shot group to see if I got consistency at 42.5 and then leave it at that for the time being till I can test velocity.
I have some 123 and 140gn ELD-M’s which I would like to work up loads for and interested to see if the heavier 140’s will actually perform in the rifle. Thanks again.