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Got a new Savage M12 Long Range Precision Varminter lately. Made it to the range for the second set of development loads today with some noteworthy results. About 25 degrees but clear and calm so good shooting. One load in particular really stood out: Berger 35 HP, CCI450, 27.0 H335 was good for 5 shots in 5/16" @3788 fps. Got about 120 rounds through the barrel so far including break-in and this is the first really outstanding group. Got 20 more of the same loaded now and the next step is to see if the group is repeatable... Hopefully it will prove out, then I can experiment with seating depth and try to improve it.
 

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Got out to the range again today confirm the load (side note: this winter when we get a 25 degree day it's WARM). Fired four more five shot groups. Went like this: 3/8"; 7/8" - horizontal string, probably operator error; 5/8" - a 3/8" group with a called flyer that opened it up; 1/2". That seems like good enough to keep working with. I will have to work on consistency behind the trigger: any little thing I do (or forget to do) opens up the group much more noticeably than with larger calibers. I'm thinking the next step is to experiment with seating depth. I used the same depth setting as I was using to get 2.25" OAL with V-Max bullets, so these were quite short. I'll experiment with the seating die and see if a longer round shoots better. I'm also going to get a hold of some BLC2 and run series with all the bullets I've got. I'm not thinking this is my ultimate load, but I'd be happy to load up a bunch and go if it was varmint season.
 

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Just something to think about, here. When you work up a load in extremely cold weather and then shoot it in extremely hot weather, you can get some pressure spikes that could be dangerous.


Molon Labe

Kim
 

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+1 on that Kim! Gotta test 'em again in the late spring/summer for sure. The load is 1/2 grain under book max so it should be fine as long as I keep the ammo out of direct sun light.
 
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