Never found a need for it, I tried it, but with 35 grain bullets more velocity is available from H110, pressure maybe slightly higher, but the cases take it very well, so well that 15 re-loads is easily achievable. At 40 grain then H110 easily ties with Lil'gun, at 45 grains H110 is maybe 50 fps down on lil'gun. But once your shooting more than 35 grain loads you should be looking at a .222 or .223 anyway.
Neil.
What velocity are you getting with 35s with H110? and 40's? I was getting 3050 fps at 12.9 gr PPU case (near max, work up folks) at 1.719" COAL 22" barrel, my current load in remington brass which has 1-1.5 gr more powder capacity so 10% higher than other brass it is going to be above 3050 fps but I've not chrono'd it. If you check with Muir Hodgdon's old Max was 14 gr but that was only possible in rem cases so it was dropped to 13 gr, pressure at 13gr with a 35 or 40 is well, well, below the SAAMI max pressure.
As for pressure being a little bit higher with H110, hodgdon's minimum load data for the same bullet and the 2 powders indicates 22,000 CUP for Lilgun and 32,700 for H110, thats basically 50% higher for 111 fps gain. At the other end and max loads Lilgun is at 28,400 CUP verses 41,800 for H110, that's a huge difference, not slightly higher.



