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Rifles, Reloading, Optics, Equipment
Reloading
300 rum load development
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<blockquote data-quote="azsugarbear" data-source="post: 1584379" data-attributes="member: 4809"><p>How many total rounds do you have down the barrel? A factory barrel (after being broken in) will see an increase in velocity with each shot fired with the same load until approx. 30-40 rounds are down the barrel. At that time, you will hit the plateau where the carbon fouling arrives at equilibrium. I have found it only takes about 10-20 rounds in a custom barrel. No point in doing any kind of tests for max velocity or ladder test until this is achieved.</p><p></p><p>Secondly, are you absolutely sure it is the brass that is making it difficult to close your bolt on a loaded round? Sometimes, we unwittingly are camming the bullet ogive into the lands ever so slightly thereby creating pressure higher than normal.</p><p></p><p>Just a couple of things to check before you start pulling your hair out. I ended up using RL33 in my 300 RUM with the 230 gr. Berger. Just a little better velocity than Retumbo (also a great powder). Unlike the other Reloader powders, RL33 seems to be very temp insensitive.</p></blockquote><p></p>
[QUOTE="azsugarbear, post: 1584379, member: 4809"] How many total rounds do you have down the barrel? A factory barrel (after being broken in) will see an increase in velocity with each shot fired with the same load until approx. 30-40 rounds are down the barrel. At that time, you will hit the plateau where the carbon fouling arrives at equilibrium. I have found it only takes about 10-20 rounds in a custom barrel. No point in doing any kind of tests for max velocity or ladder test until this is achieved. Secondly, are you absolutely sure it is the brass that is making it difficult to close your bolt on a loaded round? Sometimes, we unwittingly are camming the bullet ogive into the lands ever so slightly thereby creating pressure higher than normal. Just a couple of things to check before you start pulling your hair out. I ended up using RL33 in my 300 RUM with the 230 gr. Berger. Just a little better velocity than Retumbo (also a great powder). Unlike the other Reloader powders, RL33 seems to be very temp insensitive. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
300 rum load development
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