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Posted: 5/3/2013 6:43:37 PM EDT
| New at reloading. I have Remington and SSA cases for 6.8 and both have different primer sizes. Remington takes large rifle and SSA takes small rifle. Now my real question is how much should I reduce my charges (any at all) to compensate the different types of primers? I assume that is the case. |
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Play it safe like most reloaders do --- Work up loads for each brand of brass.
Brass can vary from manufacturer to manufacturer. And then your going from small to large primers. I load for the 6.8 using Remington and Hornady ... I worked up loads for each separate. The most accurate load for each brass is not the same powder charge for each. |
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There is a big difference in case volume. Work up a load for each of the different cases, based on case alone. Primers, even from one brand to another can have a difference of over 7,000 - 10,000 psi, so your load which may be safe with no signs at 60K might be 70K and blowing primers and possibly damaging components.
Go to 68 forums and sign up and look around. Meet the guys. If you have any load questions you can IM me and I'll be glad to help, here or there. I'm Wolf68 over there. |
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You will be OK using the same load for both, the difference will be less than 1K psi at best and the case volume difference is maybe .2gr H2o which is not enough to worry about.
The large primer case head is weaker and the primer pockets will loosen faster than the SSA cases if loaded with max loads, for this reason alone most people reduce their Rem brass loads in 6.8. I load them both with the same loads and they chrono the within 10 fps of one another which indicates no difference in volume or primer start pressure. It's always best to test them yourself and see what you get. EWP |
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Quoted:
You will be OK using the same load for both, the difference will be less than 1K psi at best and the case volume difference is maybe .2gr H2o which is not enough to worry about. The large primer case head is weaker and the primer pockets will loosen faster than the SSA cases if loaded with max loads, for this reason alone most people reduce their Rem brass loads in 6.8. I load them both with the same loads and they chrono the within 10 fps of one another which indicates no difference in volume or primer start pressure. It's always best to test them yourself and see what you get. EWP OP, this guy knows what he's talking about, so I defer to him. He has helped me with loads when I was starting. Good guy with good info. Still, I don't think that there is any reason not to be overly cautious anytime you have any variable, and work the load up for each one. You don't need to go back to the starting load, but back it down a bit and work from there. |
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Quoted:
Quoted:
You will be OK using the same load for both, the difference will be less than 1K psi at best and the case volume difference is maybe .2gr H2o which is not enough to worry about. The large primer case head is weaker and the primer pockets will loosen faster than the SSA cases if loaded with max loads, for this reason alone most people reduce their Rem brass loads in 6.8. I load them both with the same loads and they chrono the within 10 fps of one another which indicates no difference in volume or primer start pressure. It's always best to test them yourself and see what you get. EWP OP, this guy knows what he's talking about, so I defer to him. He has helped me with loads when I was starting. Good guy with good info. Still, I don't think that there is any reason not to be overly cautious anytime you have any variable, and work the load up for each one. You don't need to go back to the starting load, but back it down a bit and work from there. You are correct, this is always the best approach to any change in your loading components. Even if the loads are the same pressure that doesn't mean the same load will be the most accurate for both types of brass, so it's always best to work the load up for both and see what work the best. EWP |
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