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Just loaded 17 shells for a friend. Cartridge is a 300 weatherby mag. With out thinking I used Winchester large rifle primers. My question is will these work? Should I have used Magnum primers. The powder charge is at 10% below max load. Data for this cartridge showed CCI 215 M.

I noticed that the data I have for the 300 winchester mag cartridge shows WLR primers (non mag). So I think I will be ok as the pressures listed for the Winchster and the Weatherby (the powder charge I used) are in the same range.

Or do I need to pull these and reprime???
 
Posts: 1 | Registered: 29 August 2007Reply With Quote
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no problem at all.
always start low and work up.
 
Posts: 2134 | Location: Ohio | Registered: 26 June 2000Reply With Quote
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The Speer Manual #14 says CCI 250 primer if that helps.
 
Posts: 203 | Location: Pittsburgh, PA | Registered: 24 December 2007Reply With Quote
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Winchester primers are overall hotter than CCI.
 
Posts: 1184 | Registered: 21 April 2007Reply With Quote
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quote:
Winchester primers are overall hotter than CCI.


I wonder about that anymore. Seems like they make both types now. Still, I just use their standard WLR primers in my .300 Win. mag. and they seem to do just fine. I think that at one time, Winchester primers were about halfway in between standard and magnum primers, thus getting the reputation of being much hotter than standard primers.
I'm shooting a lot of WMR powder in several cartridges and the current WLR primers work just fine. As a matter of fact, when I tried the WLRM primers in working up loads, pressures seemed to quickly get out of hand with that powder.
Paul B.
 
Posts: 2814 | Location: Tucson AZ USA | Registered: 11 May 2001Reply With Quote
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If the friend is using them for target practice just tell him and let it go.....see what happens!!

If he's going hunting with them I'd pull the bulletsand reprime.

Many folks here have reported hangfires with not using magnum primers and a powder charge over 80 grains.....The Weatherby case approaches that much!


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Posts: 28849 | Location: western Nebraska | Registered: 27 May 2003Reply With Quote
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Its probably fine...but what kind of powder and what was the charge?

The worry is usually the other way around small case, near max load...

I use the Terry B method...if it has a belt or more than 70 grains I use magnum primer


Mike

Legistine actu quod scripsi?

Never under estimate the internet community's ability to reply to your post with their personal rant about their tangentially related, single occurrence issue.




What I have learned on AR, since 2001:
1. The proper answer to: Where is the best place in town to get a steak dinner? is…You should go to Mel's Diner and get the fried chicken.
2. Big game animals can tell the difference between .015 of an inch in diameter, 15 grains of bullet weight, and 150 fps.
3. There is a difference in the performance of two identical projectiles launched at the same velocity if they came from different cartridges.
4. While a double rifle is the perfect DGR, every 375HH bolt gun needs to be modified to carry at least 5 down.
5. While a floor plate and detachable box magazine both use a mechanical latch, only the floor plate latch is reliable. Disregard the fact that every modern military rifle uses a detachable box magazine.
6. The Remington 700 is unreliable regardless of the fact it is the basis of the USMC M40 sniper rifle for 40+ years with no changes to the receiver or extractor and is the choice of more military and law enforcement sniper units than any other rifle.
7. PF actions are not suitable for a DGR and it is irrelevant that the M1, M14, M16, & AK47 which were designed for hunting men that can shoot back are all PF actions.
8. 95 deg F in Africa is different than 95 deg F in TX or CA and that is why you must worry about ammunition temperature in Africa (even though most safaris take place in winter) but not in TX or in CA.
9. The size of a ding in a gun's finish doesn't matter, what matters is whether it’s a safe ding or not.
10. 1 in a row is a trend, 2 in a row is statistically significant, and 3 in a row is an irrefutable fact.
11. Never buy a WSM or RCM cartridge for a safari rifle or your go to rifle in the USA because if they lose your ammo you can't find replacement ammo but don't worry 280 Rem, 338-06, 35 Whelen, and all Weatherby cartridges abound in Africa and back country stores.
12. A well hit animal can run 75 yds. in the open and suddenly drop with no initial blood trail, but the one I shot from 200 yds. away that ran 10 yds. and disappeared into a thicket and was not found was lost because the bullet penciled thru. I am 100% certain of this even though I have no physical evidence.
13. A 300 Win Mag is a 500 yard elk cartridge but a 308 Win is not a 300 yard elk cartridge even though the same bullet is travelling at the same velocity at those respective distances.
 
Posts: 10181 | Location: Loving retirement in Boise, ID | Registered: 16 December 2003Reply With Quote
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