Chronos wrote:
For me I like to start by finding the bullet I want to use, then the most appropriate powder (It's amazing how many people plug away with a powder that's not ideal)
Then I look at the charge weight range, start about 1gr above minimum and load one round up to max and maybe .5-1gr over max and in either .3 or .5gr steps depending on case capacity. then I shoot them off over a chrony looking for pressure signs and recording velocity.
Somewhere there will be at least 1 or two nodes where velocity steps are closer, to me that's an indication that any load charge variation wont give big elevation changes at longer ranges
At this point I've only shot 6-8 rounds
Then i go back and load smaller charge steps either side of the range I want to work in, maybe 4-5 of each step, gives enough of any one load to resight the rifle in but I rarely shoot more than 3 shot groups of any one load. to me there's no point shooting more than 3 shots, A decent shooter will know if the load is good and 5 rounds is great on a heavy barreled target gun but can be misleading on a light weight barrel that drifts when hot
At this point I've fires around 20 rounds... ... ...
Chronos
Wow...im impressed...seriously...!!!
Firstly, i was going to shoot what i have...one of the following...hdy 50z & vmax, nos 50 & 55bt, sie 55 gameking, sie 55 varmnt (flat base)...
Was going to push them with 2208, but i also have 2209, 2206h, bm2, & 2207...
Is my choice of 2208 correct...?..., if not can you suggest what i should use & why...?
As for initial one shot/ charge weight with chrono to see where velocities are close... ...
On another rifle, i recently got 2 loads where the velocities overlapped with say up to 80fps es over both loads, the targets were absolute shyte (2moa) so i discounted them as other loads had es of 20 & sd <10fps & printed .25moa (100m)...
If i only shot one of each of these charges i could either get a false positive, or potentially miss a node...
So if its simple enough to answer, my question is how do you know you (or how would i know) i dont miss a node just shooting one shot initially...?...
Cheers