thermobollocks

A good place to start would be VV's reloading data here: http://www.lapua.com/en/products/reloading/vihtavuori-reloading-data/relodata/6 It lists a 124 grain lead load as starting at 1100-ish feet per second with N340, so that starting load is probably right around where you need to be. The OAL's going to be specific to that bullet profile, so I'd stick with whatever works with your N320. Alternately, Powder Valley has N320 in stock if you want to buy a keg or two.

Or perhaps some instruction on lubing. I'm SO tired of getting my case stuck and almost breaking off my pin. Carbide lets you jam it in dry!

one of us, one of us The Dillon is hands-down the best use of money in my entire gun-having experience.

Consider it practice at malfunction clearing. I know a full range of major and minor PF loads run in the government model Kimber I used to have, and it runs fine in the Sig I currently have with its stock springs. I find them less finicky about powder charge than bullet profile/overall length. The only thing I've found that wouldn't cycle the thing due to powder charge was Trail Boss. That said, I wouldn't sweat spring fiddling too much -- recoil springs are wear parts especially in the compact models.

I use 4 grains of Clays with a 230 grain LRN seated to 1.27" for .45 ACP major (consistently out of a 4" 625, out of my 1911 you need even less powder), 4.5 gr with a 160 grain seated to the crimp groove for ICORE (120 PF), 155s with 3.3 grains seated just below the shoulder in .40 S&W for minor out of a 5" barrel. I basically use it on everything except .223.

Really? 3 grains will make minor with a 147 out of the 5.25? They really that fast? For me, 3 grains of Titegroup and a non-moly 147 makes minor out of a 4.25". I haven't tried these bullets specifically, though. As others have mentioned, the OAL will depend on how your gun feeds and the chamber shape, and as always, work up.

I've had excellent results with 155 grain bullets in .40 Minor compared with 147 grain 9mm. It's easier and a bit safer (in terms of operating pressure) to make minor with Clays in .40, if that's what you're using. However, I only have a 9mm fullsize and a .40 5" to compare, so your results may vary with the exact same gun plus a conversion barrel. For larger casters like Missouri, the price difference shouldn't be much at all.

With the 550, the powder measure is also your flaring die -- if you use one powder measure, every time you change calibers, you'll have to calibrate the powder measure as well as the little flaring insert, which takes me like 10 minutes by itself and is incredibly fiddly. The dollars start to add up, which is kind of the reason I've "only" got 3 of those powder measures as opposed to the 8 calibers I used to load on single stage.