10/7/2023 0 Comments Cci 550 9mm primersAnd it's probably loaded up enough for HS-6 to run clean (HS-6 tends to run relatively clean in 9mm anyway). Your 6.4g HS-6 is probably running at pretty normal pressures. Probably goes without saying, but slide cycling is another indirect indicator - of course. I think you have the basics covered regarding underpressure. It seems most "normal" and well-behaved with these chamberings.īeyond a chrony, is there something else I should look for to help determine underpressue? I have the best luck with HS-6 with 9mm & 10mm (I don't load 40 S&W). I believe that the short/fat aspect ratio of the 45 ACP case helps overcome its low pressure shortcomings. It works with 45 ACP - even though it's low pressure - when you load it up near the top of the published data. It's my go-to recipe for recoil practice for my CCW revolver. I load a lot of 158 JHP's with HS-6 - with very good results. But still, good rounds can be loaded for these chamberings with HS-6. ![]() I believe the long/narrow aspect ratio of the case exacerbates the situation. HS-6 is still problematic with these chamberings, despite their being high pressure. I can get it to run clean with 357 Mag 125g JHP's, but it won't run consistent, showing high Standard Deviations. I've put a complete moratorium on using HS-6 for 38 and 44 Special.ģ57/44 Mag is fine with heavy (158/240) bullets. You will have incomplete combustion, and hence dirty guns. I couldn't tell a difference between the two pressure/velocity-wise. like a said, your biggest hurdle is light strikes and you should start 5% lower on your load and check for pressure signs. I would love to hear a first-hand account of a trip to the hospital from a mag primer. Wrecked pistol? no.unless your already pushing the limit on +p and a few more psi is going to make or break your pistol. I have heard some people with DAO pistols like kel-tec/sccy/lcr not reliably hitting hard enough to ignite mag primers, so figure out with your gun before making a ton. I personally don't change anything from mag primer to regular primer, some people will recommend you start with. hs-6 is a wonderful 9mm powder for maximum velocity loads and i'm sure the mag primer will help get all the powder burned since its a high pressure max capacity powder. CCI Magnum primers offer you that edge, plus you get all the attributes that make all CCI primers so great.I have started using magnum for all my loads, I found that my 9mm's have no problem setting them off reliably, so I don't feel like having to inventory two kinds of SPP's. Large cases, cold weather, and certain propellants often require a hotter primer flame and a longer burn. Some real-world shooting conditions require more aggressive initiation than those provided by standard primers. They are designed to flow smoothly in automated machinery, and they are more sensitive and simpler to seat than previous CCI primers. A significant benefit for progressive reloaders. Due to their extraordinarily clean burning, CCI standard primers extend the time between cleanings of primer pockets. These are the staple of any reloader’s pantry since they are called the “bread and butter” of primers. ![]() Due to their extraordinarily clean burning, CC I standard primers extend the time between cleanings of primer pockets. ![]() Warning: Magnum primers should only be used when called for in official load data. Primers for high loads employing ball propellants are small pistol magnum primers. Primer mixtures used by CCI have always been up-to-date, corrosion- and mercury-free formulations. The modern CCI primer has improved sensitivity, and simplified seating, and is compatible with progressive and automatic loading systems. CCI 550 Primers One Hundred CCI Small Pistol Magnum Primers In order to ensure that their primers are always the best they can be, CCI constantly puts them through a battery of tests.
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