Best Way to Determine your Load...

[Remington country]

Hey guys

Just about ready to start loading for my new 300RUM as soon as it comes in. I have decided to go with 210 Berger VLD and Retumbo powder I have the load data from berger they say to start with 82.5 too 92 GR. I was thinking to load 5 bullets from 82-92 with .5 GR diffrence and shoot at 200yrds to see what shoots the best..

WHATs your Opionion or favorite way to find your perfect Load

Thanks in advance

 

[t-star]

i think that you're "mechanics" are correct, but with the heavier magnums you'll want a LONGER range- i shoot a 308( actually more than one) and my groups don't start to open up until you get to 200 yards, esp off a bench-what you want to see it the VARIANCES between the loads, not just one hole- the other point i would make is that i'd start off somewhere in the middle of the powder range, as lighter loads may not give complete combustion- the more accurate loads being found near the top of the range- usually about a grain to grain and a half maximum loads- the reason they give a 10 grain range is that there may be some rifles out there that achieve pressure signs far below the "recommended " load as well as some that never see a pressure sign a,, the way to the top- what i do is look up the factory load and vary from there- plus or minus about 4 grains from there, unless 4 grains over factory violates the top end of the scale

 

[stubblejumper]

There is nothing wrong with your approach. Just watch closely for pressure signs, and if you see any pressure signs, do not fire any loads with heavier powder charges.

 

[rnbra-shooter]

- 100y or 200y is fine for initial testing

- start with the start load, even if you only fire a single round at each of the lower charge weights.

- my preferred way to do this sort of this, is to bring my loading gear to the range. I'll have all of my brass sized and primed. All I have to set up is my powder measure and my press (with a bullet seating die), and possibly a powder scale. (I don't bring a scale to the range; my powder measure has a micrometer scale, so I'll "calibrate" it at home in my loading room against my powder scale, and write in my loading book something like "min = 41 grains Varget = 48.5 scale units, max = 46 grains Varget = 66.2 scale units"). Then, at the range I can throw one charge, seat a bullet and shoot it. If I need to "fast forward" over a range of charge weights, I can just load one at a time. If I find something interesting, I can load as many as I need to.