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#8015180 - 08/26/13 08:45 AM magnum vs standard primers for 300 win mag
Snake River Marksman Offline
Campfire Regular

Registered: 03/05/07
Posts: 1177
Loc: Etna, Wyoming
I'm putting a load together for my 300 winmag. I'm using h100v and 4831sc. Is a magnum primer required?
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#8015207 - 08/26/13 08:52 AM Re: magnum vs standard primers for 300 win mag [Re: Snake River Marksman]
n8dawg6 Online   confused
Campfire Ranger

Registered: 01/19/07
Posts: 2037
not required, but optional. try it both ways.

edit: mag primer probably will make more of a difference with the hybrid powder, which is a temp-sensitive ball powder.


Edited by n8dawg6 (08/26/13 08:53 AM)
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#8015218 - 08/26/13 08:56 AM Re: magnum vs standard primers for 300 win mag [Re: n8dawg6]
jorgeI Offline
Campfire Kahuna

Registered: 06/20/03
Posts: 21517
Loc: Orange Park, Florida
A load engineer from Federal once told me if your powder charge is below 80 grains, try it first with the non-magnum primer and see what happens. I did and it worked, in my 300 Win, H&H, 338 and 375, I get more consistent accuracy with non-magnum primers. Years ago I bought a bunch of primed Fed brass in 338 and it came with 210s.
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#8015225 - 08/26/13 08:59 AM Re: magnum vs standard primers for 300 win mag [Re: jorgeI]
SuperCub Offline
Campfire Tracker

Registered: 06/27/02
Posts: 5161
Loc: NB / Canada
Are magnum primers generally used for large +80gr loads or slow powders?
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#8015298 - 08/26/13 09:32 AM Re: magnum vs standard primers for 300 win mag [Re: SuperCub]
Huntz Offline
Campfire Tracker

Registered: 10/28/07
Posts: 5296
Loc: N.E.Wisconsin
I use magnum primers with ball powders in just about any size case.I experiment with different primers just to see what gives me my best accuracy.I have found that using a CCI mag primer with H4831 SC in a 270 with 140 gr Bergers gives me super accurate groups,top MV and low SD.But that is in one particular rifle.Trying different things is kind of what loonies do!!!! grin


Edited by Huntz (08/26/13 09:38 AM)
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#8015373 - 08/26/13 10:07 AM Re: magnum vs standard primers for 300 win mag [Re: Huntz]
gmsemel Offline
Campfire Tracker

Registered: 01/28/01
Posts: 5449
Loc: East Haddam, CT
I use what ever the load call for the cartridge I am loading for. I will tell you that I been known to use the Federal 215 primer in all my ammo if I am going to be hunting in extreme cold. Sub Zero temps. In hot temps I make modifications to keep pressures with in reason. I am most concerned with reliable feeding extraction rather than the last 1/4 inch in Accuracy or that last 50 fps in velocity. Most of the time, you would not even notice the difference. I tend to do things more for piece of mind than anything else. Then again when you have 800 dollars rapped up with and elk tag for the late season you tend to split hairs. These days with shortages of ammo loaded or components to load ammo, using what ever you can find a buy makes sense. I like federal 210's and 215's but if all I can get is Remington's Winchesters or CCI's I would not loose any sleep over it.
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#8016652 - 08/26/13 04:43 PM Re: magnum vs standard primers for 300 win mag [Re: Snake River Marksman]
boatanchor Offline
Campfire Regular

Registered: 11/11/06
Posts: 1271
Must admit that I have never used H100v in a 300WM, IMO it is a bit fast burning unless you are shooting 150's. I shot 165's with H4831 for years with Fed 210's.
With 180's my powder of choice has always been RL22 with Fed215's.
In my current 300WM my favorite load is 210VLD's with H1000 and Fed 215's

Give us a bit more info on the bullet,primer, powder combo

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#8016677 - 08/26/13 04:48 PM Re: magnum vs standard primers for 300 win mag [Re: boatanchor]
Seafire Offline
Campfire Kahuna

Registered: 04/20/04
Posts: 18254
Loc: Southern Oregon USA
I light off 83 grains of H 1000 with a large rifle primer and it is more accurate than using a mag primer.. and haven't had an ignition issue down into the 20 degrees range...

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#8016818 - 08/26/13 05:31 PM Re: magnum vs standard primers for 300 win mag [Re: Seafire]
boatanchor Offline
Campfire Regular

Registered: 11/11/06
Posts: 1271
Originally Posted By: Seafire
I light off 83 grains of H 1000 with a large rifle primer and it is more accurate than using a mag primer.. and haven't had an ignition issue down into the 20 degrees range...


Of what combo do you speak of ???

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#8017191 - 08/26/13 08:08 PM Re: magnum vs standard primers for 300 win mag [Re: boatanchor]
rufous Offline
Campfire Regular

Registered: 07/13/01
Posts: 1251
Loc: Dixie, WA
I used with great success accuracy wise the F210 primer with the 180 Barnes TSX and RL22 in my 300 Win Mag. I am currently using Ramshot Magnum and the Barnes 200 LRX and the F215 primer.

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