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Joined: Nov 2007
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OP
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Joined: Nov 2007
Posts: 264 |
Here is my load for my 300 wby Barnes TTSX 168 gr Rl 22 86 gr two different primers and 200 fps faster and extractor marks with the Federal primer (L) compared to the Winchester primer. I didn't notice the extractor marks until I actually blew a primer with the Federal load. I've never seen that much difference in pressure from just a primer switch. Is this to be expected or is this an anomaly? The load is 1 gr below max also. Help
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Joined: Dec 2010
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Campfire Regular
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And different brass......
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Joined: Feb 2007
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Campfire Regular
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Campfire Regular
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You appear to have 2 different brands of brass also, so I'm thinking all else is not equal, and it's not just a primer switch that made the difference.
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Joined: Jan 2001
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Campfire Ranger
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Campfire Ranger
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Every Weatherby I own leaves extractor marks on the rim with factory ammo.
Yep. Redo one's test with consistent ammo. Change only one thing at a time.
1Minute
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Joined: Nov 2007
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yes, brass also. I meant to mention that also. still a bit baffled by the big difference.
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Campfire Tracker
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Campfire Tracker
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In my experience, RP brass is as thick as it gets in my little world. More than likely a good bit thicker than the Hornady brass on the right....the thicker brass, all other things being equal, will generate higher pressures. Obviously, all things were not equal though, with the primer difference.
Thinking the difference in cases, as pointed out by Wink is the contributing factor.
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Joined: May 2011
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Campfire Regular
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Have you checked case capacity between the two by chance? I've noted in some cartridges, the FC brass can be thickish (reduced case capacity).
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