Just a quick post of my first session today with the Rem Mt. LSS in .280. After digging thru 30" of snow to get to frozen grass I got the chrono all set up. After some zeroing in and settling the scope in, my results are the following.
55.o gr H4831SC with a 160 gr. Partition, WLR and (-.030") showed 2637 fps. Hodgdon posts it as 2660fps so it is very close for a change. Groups around an inch but too some to many any opinions.
The 55gr. H4831SC load with 160gr. Accubonds came in as a consistent 3/4 - 1" groups. Velocity was 2647fps.
I know SAAMI redlines the .280 at 60,000psi and this load is listed at 49,500psi. I think I have a little room to "kick it up a notch" to see how the speed and accuracy are affected.
