I'm still new...but I have noticed that in some manuals bullet brand and primer brand are listed for loads...is it hard and fast I have to use the brands listed for that load?
There are slight varients between bullet companies .....one 115 grain round nose might be .375 long ....another company might be .382 long ....they are both 115 grain bullets but seating the longer bullet to the same COAL as the shorter one is going to put more bullet in the case and could increase pressure.
Is it a steadfast rule to use the exact, no but back down a bit and work up ......when in doubt back off and work up.
Not really, take the 75 grain Amax in .224 diameter. It is longer than a 75 grain bthp, longer to the point that you cannot load them to mag length for an AR .... but you can the 75 grain bthp.Interesting. Seems like there would be a standard bullet size for a given caliber and grain when it comes to round nose....
Honestly the best shit to have is quickload or a friend who will run quickload recipes for you.
They are reloading guides, not holy books. There are large deviations from once source to another in printed as well as electronic sources.
It's amazing. It's like a reloading manual except you can change all the variablesNever heard of quickload...