Never change out a component when reloading unless it is published.
small pistol large pistol magnum pistol small rifle large rifle magnum rifle .50 BMG These are the primers used in all pistol and rifle ammo that is commercially available. Larger, artillery type, ammunition uses much different primers, obviously.
Small - regular - not the magnum
Never change components when reloading.
9mm Parabellum cartridges (9mm Luger) HAVE small pistol primers. For some applications such as submachine guns with a free floating firing pin, a harder primer may be used. However, in most applications, the same primer used in .38 Special would also be used in a 9mm.
Small Pistol Primers are used for small caliber pistols, any of the various 9mm calibers such as the .380, the 9mm luger, the 9x18 makarov, the .38 special, the .32 acp, the .25acp etc. and even some larger calibers such as the .40 S&W. Large caliber pistol primers are used in .45 caliber and larger. Still other calibers, such as the .357 Magnum for instance, require primers known as magnum primers.
A magnum primer produces a hotter, more intense flame. This is produced by adding a powdered metal, such as aluminum, to the the priming compound. They are used to ignite larger charges or more "hard to light" powders.
Compare exactly wit your reloading-datas. Small Pistol Mag primers have about 12 Joules and normal ones about 5 Joules. 357 mag 158 gr bullet on s&w 686-6": Vectan SP2: normal primer : 0.85gramms max mag primer : 0,77 gramms worked fine Accurate 2 : comparable, about 10% less powder. start smootly with about 15% less at least.
Small pistol small pistol primer
Follow the recommendation in the reloading manual you are using. Differnt powders might call for small pistol or small pistol magnum.
No. They are the wrong diameter, 45 you need large pistol/large rifle sized primer diameter. Also rifle primers are thicker and require a heavier primer strike that some pistols can not deliver. My Springfield XDM only intermittently can set off a small rifle primer when used to load 9mm.
I assume you mean the ammo components, i.e. Primer, Small Pistol; Primer, Shotgun. You can get these either from disassembling ammo of the same category (Sm. Pistol, Lg. Pistol, Sm. Rifle, Lg. Rifle, Shotgun, or .50 MG) or you can buy them from various vendors. The Gun Runners have it almost all the time.
The SP and SR primers are same size, but with different cup thickness/hardness and different amount/brisance of priming compound. You will need to be vigilant in working up loads. You can use small rifle primers in place of small pistol, just not the reverse.