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Rifles, Reloading, Optics, Equipment
Reloading
Changing primers during load development?
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<blockquote data-quote="Spothogg32" data-source="post: 562729" data-attributes="member: 34158"><p>Man I tell you one thing this Broughton barrel is an incredibly low pressure barrel! When I started my load development with the Berger 168gr VLD I used their load information that they provided me with. the max load was supposed to be 70.5gr of Retumbo I started at 68gr and worked up to my top load in .5gr increments. When I shot my first 5 shot string with the 68gr starting load I had dangerously low pressure signs. all 5 cases had powder residue all the way to the belt. I had never experienced anything like that before. It took a few increases in powder before the residue started moving toward the sholder of the case. When I finished working up the loads with that bullet and Retumbo powder I was at 74gr of Retumbo with a little residue on the neck of the case which I am used to seeing and absolutely no sign of pressure. No sticky bolt lift, no plunger marks, and primers were not bad either. The final average velocity was 3056fps but the ES was in the 60fps range which is not good. I have since switched to H1000 and the ES is better it is in the 30fps range but I am still not happy with that so that is my reason for playing with the cooler primers I hear that sometimes that helps improve the ES. I have decided it is a good idea to reduce my load and start over with the GM210 primers and see what the results are Thanks for all of your imput everybody. I will let you know how it goes!</p></blockquote><p></p>
[QUOTE="Spothogg32, post: 562729, member: 34158"] Man I tell you one thing this Broughton barrel is an incredibly low pressure barrel! When I started my load development with the Berger 168gr VLD I used their load information that they provided me with. the max load was supposed to be 70.5gr of Retumbo I started at 68gr and worked up to my top load in .5gr increments. When I shot my first 5 shot string with the 68gr starting load I had dangerously low pressure signs. all 5 cases had powder residue all the way to the belt. I had never experienced anything like that before. It took a few increases in powder before the residue started moving toward the sholder of the case. When I finished working up the loads with that bullet and Retumbo powder I was at 74gr of Retumbo with a little residue on the neck of the case which I am used to seeing and absolutely no sign of pressure. No sticky bolt lift, no plunger marks, and primers were not bad either. The final average velocity was 3056fps but the ES was in the 60fps range which is not good. I have since switched to H1000 and the ES is better it is in the 30fps range but I am still not happy with that so that is my reason for playing with the cooler primers I hear that sometimes that helps improve the ES. I have decided it is a good idea to reduce my load and start over with the GM210 primers and see what the results are Thanks for all of your imput everybody. I will let you know how it goes! [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Changing primers during load development?
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