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What kind of ballistics can I expect from Winchester factory 200 Gr JSP 44-40 ammo from a 16" carbine barrel ?

Hi, Does anyone have any experience with VihtaVuori N-340 powder ? I'm trying to develop .45 Colt loads with 225 Gr plated hollow-based bullets for my 4-5/8" Ruger Blackhawk, say around 900 fps'ish. The closest I can find on VihtaVuori's own site are loads for : 200 Gr LSWC : 10.9 Gr to 11.6...

I realize V-V powders are not the most commonly used in the US, bu they are very good and -best of all- readily available over here. The .38 Spl loading data on their site don't mention if the loads generate regular or +P pressure. Does anyone here know of another source for .38 spl. loads with...

The other day I tried another new .45 Colt load from my Ruger Blackhawk : 200 gr. .452-sized cast LSWC & 8.5 gr. of VihtaVuori N 320. I developed this load earlier with a dozen test loads and everything seemed OK : report, recoil, case extraction/ejection, primer appearance, even accuracy was...

Well, the title says it already. My favorite handgun primers (Federal) are unobtainable -again-. Last time this happend, I used Sellier & Bellot primers . They were far less expensive, but less reliable in some of my guns (harder material / light hammer strikes ?) So this time, I bought...

Am I right in assuming that : All else being equal (gun, caliber, primer, bullet,) a charge of slow-burning powder can achieve the same muzzle velocity as a load of fast-burning powder, but will do this at lower pressure ? Does this also mean that the slow-burning powder charge will exhibit...