Originally Posted by
bullbarrel
I have to say I've found the complete opposite. COL has made all the difference, powder change just makes the group go in different places (within reason). Sure if you have the wrong COL then powder changes might result in a nice group, but not consistently.
Just my 2p
And if its raining then
this and
part 2 is worth watching. But skip the bits about concentricity and come back when you have 1/2 moa groups.
my main point Andy was he was trying to run before he walked with measuring the COAL and trying to load with a short jump, if he starts at the book length and works up an accurate charge he can fine tune the accuracy by adjusting the length.
Factory ammo isn't loaded to a suitable length for a given rifle, it is loaded to an average length, yet many people happily shoot factory ammo accurately for the whole of their career,
most people are trying to get the maximum speed out of their ammo so are unlikely to settle for a middle of the road load, so why not start by working out the powder charge that gives you the best velocity and then work out the fine detail of the COAL once you have that ?
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