Thread: Breaking in the 260rem and load development

When I started down the path to reloading, and my initial post on the load development of the 270, I decided to take the 260 (REM. Mod700 SA, 22” Truflite match barrel, 1:8.5” twist, in a HS Precision stock) to the range at the same time, mainly to continue the barrel break in process but also to settle myself in at 100m before cranking up the big gun.

I had photographed the initial five rounds to get it on paper (which I can’t track down now) at 75m and the group was looking very promising but rounds five to ten showed around a six inch vertical spread. I’m using factory Remington 140gn Corelokt.



Checked the barrel back at home and was looking pretty crudded up so gave it a careful clean and the next range session gave me these results. About 2 1/4” horizontal spread. First two touching then it started to wander off.



Not expecting too much at this stage re accuracy but the process is definitely showing some interesting results. Gave the barrel another clean so will see if anything changes again on the next five that I have left. Not sure where I’ll go with it next but if it seems to have settled down will probably attack load development after sorting the 223.