Laurie loaded .308 Win ammo* with sixteen LR primer types and after that analyzed for typical velocity, ES/SD, and group dimensions. This may be one of the most detailed and thorough LR primer examination at any time finished. Listed here are the primer sorts examined:
An additional issue it is best to recall is that the primers you employ in your .38s are the identical primers that you use inside your .357s, which function at twice the pressure from the .38s. And you are taking pictures both masses in mainly exactly the same guns, regardless if you are discussing K-body S&Ws or GP-100s.
Welcome towards the board, BTW. Often happy to check out a different member. Take a look at all another message boards also, and be sure to leap during the discussions.
Protection Observe/WARNING: If you're going to do the exact same experiment, you have to achieve this with warning. This is the moderate load that 3 grains below max load on MY rifle.
There isn't a want to worry much about hardness in that area because it isn’t in which the firing pin strikes. There have already been instances exactly where that location became so hard as to generally be brittle, and there may be a tiny perforation if the primer was fired. Some suppliers consist of an annealing phase to circumvent that chance.
Tests sixteen primer sorts was an enormous process — we commend Laurie for his effort and thoroughness. This substantial take a look at is a crucial contribution on the “information foundation” of precision capturing.
On the other hand, if the developments among the primers you examined hold legitimate across lots of unique powders and cartridges, it will drastically aid choosing a small quantity of various primers to continue hand to test in case the initial choice was unsatisfactory.
An actual good diagram of a primer including its components is incorporated and a short description of primer compounds is likewise incorporated,
Insert to quote Only clearly show this consumer #one · Jan 4, 2011 When reloading manuals specify particular brand names of primers, can A different producer's primer of the identical sort be employed? Put simply, are you able to substitute different manufacturers with primers as you are able to with situations?
Never to hijack this thread but a federal primers for 223 pal of mine that produces ammunition suggests the Federal 210M primer. Why, I do not know as he was hoping not to present me proprietary facts. I will use the Lee Hand Priming Resource Once i get around to utilizing the Feds. Ken, the box is baaaaad.
The principle query That is still for me is how the primers results may possibly fluctuate among distinct cartridges, bullet weights, and powder hundreds. It's got usually been my impression that very low ES/SD correspond to optimized combustion; that's to say once the primer, cartridge quantity (force cell), powder cost, were all optimized to offer ideal combustion for any provided bullet excess weight. It is outside of concern that switching primers can typically enhance (reduced) ES/SD which has a provided load.
(I'd only reported that I was having to use a lot of pressure around the cope with to seat primers in industrial scenarios.)
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There weren’t ample hundreds on 6mmBR.com referencing large rifle magnum primers to deliver an ample sample size to get a comparison. Nevertheless, Here are several of the magnum primers generally used for match grade ammo (no certain get):