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OP
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Do the 95 grain Nosler BT and the 95 grain Winchester Combined Technologies use the same load data, or does the black coating on the WW CTs make them slicker and therefore use more powder. The reason I ask is that a close friend of mine had a bunch of loads made up by a mutual friend who has since passed away. He now needs more loads. When I broke down the CT load, there was a charge of 46 grains of H4831sc in the case. That is at least three grains over the Nosler manual max for the BT.
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Joined: May 2011
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Is there any chronograph info for these loads by chance?
What case manufacturer is being reloaded? Cartridge overall length?
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I think you should work up a new load instead of making decisions based on taking one apart.
One shot, one kill........ It saves a lot of ammo!
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Campfire Outfitter
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I think you should work up a new load instead of making decisions based on taking one apart. Yep, nailed it.
Swifty
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Campfire 'Bwana
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Campfire 'Bwana
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Leon, for most practical purposes, the CT is interchangable with the NBT. In one or two instances I've had to back off a bit going from the CT to the NBT, but not 3 grains worth.
IMO some of Nosler loads involving H4831 are on the anemic side.
Regardless, there is not substitute for working up and testing yourself.
You didn't use logic or reason to get into this opinion, I cannot use logic or reason to get you out of it.
You cannot over estimate the unimportance of nearly everything. John Maxwell
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Joined: Jul 2005
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+1 on working up a new load. Even when I start with a new can of powder, I back off and start fresh on a load. Powders vary from lot to lot and Son of Gael stated, the loads for the original 4831 aren't the same as for 'modern' version of 4831.
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Joined: May 2005
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OP
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Thanks guys. Yes, I intend to develop a new load, but I could not imagine a good reason for the load to be a full four grains over Nosler's max. I know that some of the Nosler data is a bit light, but not by that much.
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Joined: Jun 2005
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Campfire Outfitter
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"When I broke down the CT load, there was a charge of 46 grains of H4831sc in the case. That is at least three grains over the Nosler manual max for the BT."
Am I missing something here? If that powder is in fact H4831SC there is no way it could be old milsurp H4831. Are the ammo boxes labeled as H4831SC? AFAIK load data for the two bullets is the same. Paul B.
Our forefathers did not politely protest the British.They did not vote them out of office, nor did they impeach the king,march on the capitol or ask permission for their rights. ----------------They just shot them. MOLON LABE
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It seems that the burn rate of H4831 has gotten faster when production moved to ADI in Australia.......
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The ammo box was labeled H4831sc, but there was no charge amount listed. So I pulled the bullet on the one remaing case after measuring the COL and was amazed to see the weight on the scale, and yes the scale is accurate. Tim told me the load was hot, but holy cow.
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Campfire Ranger
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Campfire Ranger
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Sounds like his method of working up loads was to get to the point the primers fall out, then back off 1/2 gr.
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It seems that the burn rate of H4831 has gotten faster when production moved to ADI in Australia....... Powder formulation is subject to change. I believe mule deer has commented on this. Giving the period of time that has lapsed you most likely will be dealing with a different formulation. Shod
The 6.5 Swede, Before Gay Was Ok
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