Update
Done a 3 shot test increasing .5 gr
Started at 59.0 gr
180 grain interlock flat base bullet. F210 primers. Bullet ogive is 2.755
24 inch steyr with 10 twist.
This is my 0-300 yard meat gun in the woods of the south. I typically use 4350 but I'm out and I have a new jug of RL26
Wanted to see if I could get 1 powder for multiple guns. Any way.
Started out at 59 gr
59 gr 2634,2639,2615
Skipped 1.5 gr
60.5 2722,2720, crono graph didn't read
1/2 group
61 grain 2750, 2742,2755 3/4 in group
61.5. 2789,2769,2770 1/2-3/4 group
62 gr. 2838,2809,2819 1/2 group with 1 flyer
62.5 2824,2797,2782. 3/4 - 1 inch group
63. 2853,2850, 2855. 1/2 group
now I stopped there. I alway look real close at the brass for pressure signs. I noticed that I could see pressure signs here. Ejector marks and brass swipe. I further went back in the load and could see the Small progression of pressure signs. I found that 61.5 grain showed no signs of pressure. main thing about this is you could take all twenty or so shots and put inside 1 Moa group at 100 yards.
Didn't see any major gaps in speed so I'm thinking I'm ok with the 210 primers.
I'm eventually going to back off and redo these load with magnum and see what it produces. anyway just want to share.