“How do I get to another amount?” effectively, you will get to another degree by being the 1st one particular within the range and the last just one to go away.” – Jerry Miculek hounddawg
For OP’s intent I'd toss 50 or so fees and weigh each one to find out what sorry of statistical spread I could expect. Then consider to locate a load where by that degree of dispersion will be Protected after which assess precision.
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Feb 21, 2016 #6 Originally Posted By: AZ RONI didnt know i hit it to start with. Earlier during the afternoon I'd to move it again since the muzzle blast in the 22-250 was knocking the Sunshine shades off. I did not notice the .223 rounds were being barely clearing the Chrono until i switched to your heavier rounds. The bullet went as a result of so rapidly and so clear that my 1st sign was "ERROR 3" on my cell phone. Once i walked up into the chrono there was an entry entire nearly the display nevertheless the again was imr 3031 load data 223 entirely blown out.
I was thinking it had been IMR3031 but it absolutely was a SR4759 equivalent that was utilized for .30 cal M22 teaching rounds. Disregard the military services reference for IMR3031. cosh
As you'll have gathered from the above posts, There is certainly additional than force and velocity to think about in precision loads. The tension curve, bulk of your powder, and simplicity (and thus regularity) of ignition all have an effect on the issue. A fast powder may well not provde the most effective velocity on your peak stress benefit, but for just a offered velocity it creates reduce muzzle blast than the usual slower powder, which affects Preliminary bullet yaw sometimes adequate for being noticed in group sizing.
The armed service powders were being succeeded by an “improved” series, as a result IMR, which gave its title on the gunpowder organization which was spun off in the guardian within the 1980s. IMR has become owned by Hodgdon.
“How do I get to another degree?” perfectly, you will get to the following level by getting the main a single over the selection and the final one particular to depart.” – Jerry Miculek hounddawg
signifies that when the quantity of cartridges has mushroomed, no Similarly versatile powder has come along to displace IMR-3031. Loads are still detailed For lots of cartridges. In over fifty decades, it's dropped none of its usefulness.
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Been loading this along with other IMR powders Considering that the late fifty's. Always, usually dependable in all weather , no gimmicks or extravagant promises , just performs. Add an assessment
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223 will not like in my practical experience. it might cling up when metering in the evaluate, go just a little slower but steady when dispensing powder. You may want to evaluate the fees as there might be some variation.