My 300 "Slowpoke" which is an improved 300 RUM likes the H870 much better than the H869. The RL25 works well also but Retumbo at least in my 27 inch Krieger Speedy built rifle is not consistent and is no longer in the mix. Have not tried the Win WMR yet but will when the BR season is over and I get some time I will. FWIW the 190 SMK and the 210 SMK is the favorite pills it likes so far.
The rifle is a 27 in Krieger built on a McMillan sporter stock using a BAT repeater and a printed jewel trigger ----- the Brake is the Speedy design.
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Sorry but this was in my 300 Slowpoke which is a improved 300 RUM it increased at 5.5% ofer the parent-----my screwup sorry cought it when I reread the post. I would not start with these loads in a RUM by any means.
JWP475 is correct about the H870 but in my gun it works better plus I have 16lbs of it. I only have 1 data sheet with me and I am looking for the other but here ya go --- this was the first rattle out of the box with no pressure signs yet but I an very happy with the 2 200 gr loads.:
H870 106.0 200 SMK = Low 3180 High 3212 avg 3193 10 shot string grp size 1.1 vertical stringing may have been my fault 8 shots in .6 several in the same hole best of the bunch and is my hunting load so far
I assumed from Hodgdons website that they still sold H870 since they listed recipies for it. I will probably try some H1000 instead since I already have some US869.
One thing I really like about the US869 is that it meters very well. I can drop a charge about 0.1 grain under and trickle in the last 0.1.
Thanks for the recipies. You got some really high velocities out of your 27 inch barreled gun. Based on the velocities you are getting I am leaning toward cutting my barrel to 28 inches instead of 30 like I originally posted. One downside I learned about longer barrels is the guns won't fit in many cases. I plan on getting a Pelican or Storm case to tote my 300 Rum in. They are only 50 1/2 inches inside. This will limit me to 28 inches plus a flash hider and I will have one inch to spare in the case.
I plan to test 240 SMKs loaded with 98gr of US869 for accuracy soon. One group of three 240 SMKs I tested for velocity were 2965 fps +/- 10fps. The velocities ever very tight. I have not shot for groups yet. Base on the velocity consistincy the 240 SMKs should be accurate.
In an earlier post you alluded that you are a benchrest shooter. I have a question for you.
What is ES? I assume that SD is standard deviation but I have not been able to find or deduce what the acronym ES stands for.
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