You'll likely NEVER notice the difference unless you're a very dedicated varminter-and most of these guys aren't going to be shooting factory rifles if they even shoot standard cartridges.

Here's the skinny on the difference: Say you shoot a .22-250 and a .243 parallel to eachother at the exact same time against a crosswind, as your bullet flies, it's going to drift in proportion to the windspeed-if the bullets effected the same air resistance, in the same period of time they'd drift laterally the same distance, but the .22-250 is a bit faster, so say in a half second they laterally drift 2", in the same half second, the .22-250 flies farther, so if you checked them at the same range, the .243 would have drifted farther-same principle proves why faster=flatter shooting, gravity and wind effect them the same per amount of time, not per distance, so faster should fly straighter....BUT, the .243 has a considerably heavier bullet (usually, some people shoot 55grn's in both of them), a heavier bullet has more linear momentum, Newton's law, object in motion wants to stay in motion, like pushing a rolling marble off course as opposed to a rolling bowling ball, the heavier it is, the harder it is to push it off course...so a heavier bullet is less affected by the wind.

At long ranges (about 400yrds and out), the momentum theory wins out, wind gets a BIG hold on little bullets as they get way out there...ranges most guys hunt at, you'll probably never notice the difference.

thx for the great reply nomercy but.....i want to know how much of a role wind plays at those long distances since in my area there r many open fields and i want to be able to hit yotes out to 400-450yards.

is there any website i can goto to see charts of wind affects on factory loads?

say if i get a .22-250 i can shoot 40gr - 55gr factory loads right.....
but if i get a .243 i can get 55gr - 100 or sumthing....

i will probly never use it for deer (no rifle hunts in this area, got rifled shotugn barrel for that) and if i do go north where u can use a rifle i have a .303 for moose, bear, deer, etc.

so which would be better? the .243 where i can get 55gr? or .22-250 with 40gr?

so overall would the .243 with 55gr or 75gr ballistic tips be better or the .22-250 with 40gr or 55gr be better?

i want to be super sure i get the right one since im ordering from alberta so its not as easy to return, plus it take a long time to get back.

please remember i will be frequntly be making shots at 250 - 425yards.

thx

ch312