Just rebarreled my McM TAC 300 with Bartlein 5R 28" 1:10 Heavy Palma. Looking for starting loads using H1000 or Retumbo. Norma brass and 215M primers. Thanks.
300 WM with Berger 215 Hybrids
- Thread starter ZiaHunter
- Start date
My load with the Berger 215s was:
78.5 grains H1000
Fed 215 M
Nosler Brass
Was pushing them right about 2870 out of a 24" Proof Barrel
78.5 grains H1000
Fed 215 M
Nosler Brass
Was pushing them right about 2870 out of a 24" Proof Barrel
I am on my second 300 wm developing a load both shoot the same powder charge very well.
77.4 H1000
Fed 210M primer
Norma brass
.015 jump
24" bartlien 2950 sd of 5
27" bartlien not broke in yet 2880's
Start at 75.5 or so and work up started to see pressure at 77.7 especially on seating depth test when I seated deeper into case and took away some case capacity pressure spiked some.
77.4 H1000
Fed 210M primer
Norma brass
.015 jump
24" bartlien 2950 sd of 5
27" bartlien not broke in yet 2880's
Start at 75.5 or so and work up started to see pressure at 77.7 especially on seating depth test when I seated deeper into case and took away some case capacity pressure spiked some.
Have shot this load out to 1825 yards with good accuracy. I also shot it at a local 1000 yard match won with 95 3X
26in Bartlein M-40 contour
Brass Nosler
Primer 215M
Powder H-1000
Charge 74.5
AVG FPS 2851
Jump .020 off
COAL 3.665
26in Bartlein M-40 contour
Brass Nosler
Primer 215M
Powder H-1000
Charge 74.5
AVG FPS 2851
Jump .020 off
COAL 3.665
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I’m running 76.1gr H1000 in Federal brass .020” jump with CCI magnum primer. Getting 2830fps avg from a 24” AINA Bartlein and single digit ES’s.
I have two Broughton 1:9's chambered in 300WM, that have both been hammers with the 215Hybrid. I don't think through load development for either barrel I have ever had a group go over 3/4moa. Have never shot anything but the 215Hybrids down the pipe and don't plan on changing.
Norma brass for both.
F215 primers for both
The older barrel tunes up at 77.0gr the newer at 75.5gr with H1000.
Loaded to max OAL for AICS 300WM.
The 77.0gr load runs 2860fps out of a 20" barrel with an Ultra 7 attached and single digit SD's.
If you can't get 75-77gr of H1000 to shoot the 215Hybrid you will be one of few. That load flat shoots and hammers game.
Norma brass for both.
F215 primers for both
The older barrel tunes up at 77.0gr the newer at 75.5gr with H1000.
Loaded to max OAL for AICS 300WM.
The 77.0gr load runs 2860fps out of a 20" barrel with an Ultra 7 attached and single digit SD's.
If you can't get 75-77gr of H1000 to shoot the 215Hybrid you will be one of few. That load flat shoots and hammers game.
