PWS
Silver $$ Contributor
A little background, I have an opportunity to work this summer at a remote location where shooting is almost unlimited in direction and distance. With that in mind, I picked up a Sendero 300RUM this week and fired the first test loads today. I have one more week to come up with a final load and due to time and location constraints, only have the choice of 2lbs of Retumbo and 8lbs of US869.
Are these results where they should be in terms of velocity from this 26" 1-10 barrel or am I leaving some speed on the table?
Hornady 225grELD-M (one shot each, just getting on paper w/Retumbo so no impact info, but US869 appeared to cluster around 101.5gr/2960fps)
Retumbo US869
84.0 - 2788 99.0 - 2801
84.5 - 2788 99.5 - 2810
85.0 - 2810 100.0 - 2864
85.5 - 2822 100.5 - 2885
86.0 - 2863 101.0 - 2919
86.5 - 2879 101.5 - 2966
87.0 - 2890 102.0 - 2908
87.5 - 2911 102.5 - 2957
88.0 - 2925 103.0 - 2991
Berger 215Hybrid (one shot each, Retumbo clustered around 89.0gr/3000 and US869 around 102.0gr/2950)
Retumbo US869
86.0 - 2871 100.0 - 2871
86.5 - 2921 100.5 - 2956
87.0 - 2912 101.0 - 2916
87.5 - 2932 101.5 - 2925
88.0 - 2960 102.0 - 2949
88.5 - 2964 102.5 - 2950
89.0 - 2999 103.0 - 2990
89.5 - 3004 103.5 - 3023
90.0 - 3031 104.0 - 3020
The Hornadys gave me a few flyers that resulted in overall group size around 2" for all the shots in the ladders at 100 but the weather was rotten, 15-20mph wind from 1:30, 40degrees, and driven rain (ya, lots of fun but at least the range is mostly covered). Bergers hovered around 1 1/4" at the same distance. At this point, it looks like I'll have more Bergers sent to me and load 102.0gr US869.
Brass is new ADG and showed no extractor marks or "signs" of high pressure although the heavier loads did cause a little more scuffing. The Fed215s showed a little cratering with all loads so I ignored it. Loaded lengths were single-feed at 3.900" for the ELDs and 3.915" for the Hybrids.
Thanks for the comments!
Mike in Kodiak
Are these results where they should be in terms of velocity from this 26" 1-10 barrel or am I leaving some speed on the table?
Hornady 225grELD-M (one shot each, just getting on paper w/Retumbo so no impact info, but US869 appeared to cluster around 101.5gr/2960fps)
Retumbo US869
84.0 - 2788 99.0 - 2801
84.5 - 2788 99.5 - 2810
85.0 - 2810 100.0 - 2864
85.5 - 2822 100.5 - 2885
86.0 - 2863 101.0 - 2919
86.5 - 2879 101.5 - 2966
87.0 - 2890 102.0 - 2908
87.5 - 2911 102.5 - 2957
88.0 - 2925 103.0 - 2991
Berger 215Hybrid (one shot each, Retumbo clustered around 89.0gr/3000 and US869 around 102.0gr/2950)
Retumbo US869
86.0 - 2871 100.0 - 2871
86.5 - 2921 100.5 - 2956
87.0 - 2912 101.0 - 2916
87.5 - 2932 101.5 - 2925
88.0 - 2960 102.0 - 2949
88.5 - 2964 102.5 - 2950
89.0 - 2999 103.0 - 2990
89.5 - 3004 103.5 - 3023
90.0 - 3031 104.0 - 3020
The Hornadys gave me a few flyers that resulted in overall group size around 2" for all the shots in the ladders at 100 but the weather was rotten, 15-20mph wind from 1:30, 40degrees, and driven rain (ya, lots of fun but at least the range is mostly covered). Bergers hovered around 1 1/4" at the same distance. At this point, it looks like I'll have more Bergers sent to me and load 102.0gr US869.
Brass is new ADG and showed no extractor marks or "signs" of high pressure although the heavier loads did cause a little more scuffing. The Fed215s showed a little cratering with all loads so I ignored it. Loaded lengths were single-feed at 3.900" for the ELDs and 3.915" for the Hybrids.
Thanks for the comments!
Mike in Kodiak