300 WM with Berger 210 grain VLD and IMR 4350

Cannon-300

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Joined
Sep 6, 2017
Messages
8
Location
North Carolina
I have a new 300 WM with a 26 inch barrel with 1:9 twist and 0.160 of free bore. I am in need of advice on a load to start with. I will be using 4350 powder and Berger 210 grain VLD bullets. My COAL to touch the lands is around 3.640 in. by my measurements with a Hornady OAL gauge but when I seat a bullet to this COAL and cycle it through the rifle the cartridge comes out around 0.050 shorter at 3.590 in. Therefore I plan to start at a COAL of 3.590 in which may actually be touching the lands. My Berger reloading manual does not give any data for bullets which are seated out farther, therefore I am not sure where to start my powder load. If anyone has experience with this combination and would be willing to share your load data it would be much appreciated. Thanks, Mike
 

journeymanwirecontrols

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LRH Team Member
Joined
Feb 8, 2014
Messages
10
Location
Havre, Montana
I have a new 300 WM with a 26 inch barrel with 1:9 twist and 0.160 of free bore. I am in need of advice on a load to start with. I will be using 4350 powder and Berger 210 grain VLD bullets. My COAL to touch the lands is around 3.640 in. by my measurements with a Hornady OAL gauge but when I seat a bullet to this COAL and cycle it through the rifle the cartridge comes out around 0.050 shorter at 3.590 in. Therefore I plan to start at a COAL of 3.590 in which may actually be touching the lands. My Berger reloading manual does not give any data for bullets which are seated out farther, therefore I am not sure where to start my powder load. If anyone has experience with this combination and would be willing to share your load data it would be much appreciated. Thanks, Mike
 

journeymanwirecontrols

Member
LRH Team Member
Joined
Feb 8, 2014
Messages
10
Location
Havre, Montana
I have a new 300 WM with a 26 inch barrel with 1:9 twist and 0.160 of free bore. I am in need of advice on a load to start with. I will be using 4350 powder and Berger 210 grain VLD bullets. My COAL to touch the lands is around 3.640 in. by my measurements with a Hornady OAL gauge but when I seat a bullet to this COAL and cycle it through the rifle the cartridge comes out around 0.050 shorter at 3.590 in. Therefore I plan to start at a COAL of 3.590 in which may actually be touching the lands. My Berger reloading manual does not give any data for bullets which are seated out farther, therefore I am not sure where to start my powder load. If anyone has experience with this combination and would be willing to share your load data it would be much appreciated. Thanks, Mike
I have to agree with big bulls, you should use a much slower burning powder, especially with such a heavy bullet and one that will fill that case all the way up. I dont feel the 4350's are pushing this case to its full potential. Start with lighter charges and slowly work your way up, watching for pressure signs as you go. I use the burger 210 myself in my 30-378, getting great groups. Have fun.
 

can1010

Well-Known Member
Joined
Feb 27, 2012
Messages
741
210 , 215 Berger, H-1000 start 74.0 max around 78.0
IMR7977 good alternative start one grain less
210 vld just touching is golden
 

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