Primer interchange?????

[tc_firefighter311]

Im looking to reload some 36gr varmint grenades for the 22-250 to shoot some coyotes. The primer the book calls for is federal gm210m. My question is i cant find any. There is none in stock any where i have looked local. My question is can i interchange them and use Winchester WLR primers. I was just wondering if primers are different, or just what?

 

[ksthomas]

Re: Primer interchange?????

Yes, you can interchange them, however, there's some things you need to understand. When dealing with shotshell loads, you need to use EXACTLY the same components as the load book calls for, no changes, no deviations. Not quite the same for metallics, and there's a good degree of interchangeability in the loading data. Changing primers, or most any other component <span style="text-decoration: underline">will</span> change pressures. Sometimes up, sometimes down. Point is, you really have no way of knowing without trying. Standard rule is, when changing a component such as a primer, always reduce the load to start levels, and work it back up as pressure signs allow. You should be able to switch to the WLR primers without a problem, but reduce the load, and work it back up slowly.

 

[tc_firefighter311]

Re: Primer interchange?????

Min charge is 36 grains and max is 40 grains. Where would you start??

 

[devin_hor]

Re: Primer interchange?????

Start at 36 and work your way up to 40 looking for pressure signs and accuracy, go up in .5 increments to 40, load 3 each of 36, 36.5, 37, 37.5, 38, 38.5, 39, 39.5, and 40. If you don't get signs of pressure start at 40 and work your way back in .3 increments until you find your most accurate and fastest load.

It's pretty common to use different components than the book lists, the bullet and powder need to be the same, but brass and primers will interchange at lower charge weights. Once you have your load don't try to switch brass or primers expecting the same load though, they will change things slightly, a different primer could make your good load bad, or your good load great, just something else to experiment with. They will change the pressure, so if are using close to max load a little hotter primer or a different brand of brass could boost the pressure up enough to put you over the top. Use what you have but always start low and work your way up, I like to look at 2 or 3 different sources for charge weights, they are usually a little different and you can get a good idea of what might work.

 

[tc_firefighter311]

Re: Primer interchange?????

Thanks guys. I will start out lower and go from there.