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Awww Crap! I need some primer help.

 
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  #1  
Old 12-05-2012, 07:45 PM
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Join Date: Nov 2012
Location: Bremen, Georgia
Posts: 33
Awww Crap! I need some primer help.

I was just about to start on my load development for my new 110 FCP HSP .338 Lapua Magnum and I realized that I have the wrong primers! What I was going to load with was the Federal Gold Medal Match Large Magnum Rifle primers (GM215M). But I realized that my entire case of 1,000 is GM210M, the same Match primers but for non Magnum.

I remember now when I was developing my 300 Win Mag load, the guy at Georgia Arms (where I buy most of my components) said that the Match grade primers (GM210M) should work for my 300 Win Mag and H1000. I have gone through about 500 rounds so far of my 300 Mag with those primers and I'm very happy with the load and my accuracy.

Course it was 10-15 years ago that the GA Arms guy convinced me to try them and I completely forgot about it. I hadn't bought any primers for my 338 LM load, because in my head I just figured I had the GM215M primers, arg!

Has anyone used the GM210M primers for 338 Lapua Magnum loads? I ask, because all of my local contacts are out of these primers and it will be weeks before they get any (if that) and all of the online stores like Wideners will take weeks themselves to get caught up on their back log (plus the extra hazardous freight tax). I can wait I guess, but I have the whole week of Christmas off and was hoping to finalize my load and get doing some Long Range shooting.


Here's my load so far:
  • New Lapua Brass
  • Nosler AccuBond 300 grain Bullets
  • Federal Gold Medal Match primers GM215M (though I have GM210M)
  • And 5 varying loads of Hodgdon H1000 powder to find the best load
    • 88.0 grains x 5 rounds
    • 88.5 grains x 5 rounds
    • 89.0 grains x 5 rounds
    • 89.5 grains x 5 rounds
    • 90.0 grains x 5 rounds
What do you think?
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Old 12-06-2012, 08:06 AM
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Join Date: May 2012
Location: N.D.
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Re: Awww Crap! I need some primer help.

What can you get for mag primers at present??? Wlrm and standard 215 are just about identical to the 215M and both are usually more available. The Lapua is getting rather big for a standard primer. I usually go to mag primers at 50 grains powder or so here in ND, so that's about all I have for primers, save for a case of 210's for the 22-250.

You could probably get a bit coarser in your grain weights too with your rifle. The lapua will burn 100 grains of powder and 1/2 grain is really a fart in the breeze to it. In my 300 rum I usually use two grain steps until I get in the ballpark then wander in at a grain here or there.

Last edited by Lefty7mmstw; 12-06-2012 at 08:11 AM. Reason: charge weight comment
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  #3  
Old 12-06-2012, 09:44 AM
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Join Date: Nov 2012
Location: Bremen, Georgia
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Re: Awww Crap! I need some primer help.

Thanks Lefty.

I will definitely rethink the .5 intervals. I had just narrowed it down to the 2.5 grain range that I saw was most affective. I could just do 3 different loads with 2 different lands within each (5 rounds each):
- 88.0 grains 0.015" off lands
- 88.0 grains 0.025" off lands
- 89.0 grains 0.015" off lands
- 89.0 grains 0.025" off lands
- 90.0 grains 0.015" off lands
- 90.0 grains 0.025" off lands

As info my 300 Win Mag load used 83.0 grains of H1000 compressed and always shot awesome with the non magnum, but Match grade large rifle primers (GM210M). That was the main reason I asked, since 83.0 grains of H1000 seemed to do fine with that primer.

Good news! Adventure Outdoors has the Federal GM215M primers and I'm going there during lunch. I buy most of my guns from them, but until now never any reloading components.
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Old 12-06-2012, 10:10 AM
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Re: Awww Crap! I need some primer help.

I have had a few lapua's and the best shooting one shot 215M primers, but I had a BA that shot almost as good and I was shooting RL17 and 210's out of that one. so I don't always know that mag primers are a must depends on the the powder mostly I guess.
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Old 12-07-2012, 11:24 AM
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Location: Bremen, Georgia
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Re: Awww Crap! I need some primer help.

While I was at Adventure Outdoors over paying for the primers I needed, I checked and my Gun was in!!

I'm in love with that heavy fluted barrel and HS Precision stock

And it did have 3 sling swivel posts like the 111 LRH (even though the person at Savage said it didn't come with any like the picture on their site)

I already took the stock rail off and put the new one on. But I'm waiting to do the rings until my lapping/bedding kit gets in.

SWEET gun. I can't wait to know her inside and out ;-)
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Old 12-07-2012, 11:59 AM
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Re: Awww Crap! I need some primer help.

Some time ago I read on here where a dude got one hole results when he tried the CCI BR-2 primers. (Think it was a 338)

I will try them some day cause I stopped in OKe-city on my annual CO ELK treck and picked up a (1K) box cause I'm to poor to pay for shippeng fees on the stuff. Them bad boys were $52/k but your and my GM215M were only $34/k. Might be worth a try....one hole would be good.

But, remember Grandpa 1949 - "Son, The first shot is the important one - the others just make him run faster"!
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Old 12-07-2012, 10:12 PM
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Re: Awww Crap! I need some primer help.

he had a lot of other good things going to shoot like that, doubt the primers were the main reason for it ;-) The only place I use CCI is primers is making military spec .223 rounds; just my preference. I have had excellent consistency with Federal Gold Medal Match primers and see no reason to try anything else Course who knows, if I don't get the results I'm looking for, I may just try 100 of them.
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