Can anyone tell me what differences there are in Winchester WLR primers and Federal Gold Medal GM210M primers? Any charge differences? This is for 284 Winchester cartridge. Any favorite big game loads for the 284? Thanks

All primers are slightly different. Drop the powder charge 5% & work backup, that's a conservative solution.

The WLR's are decent for hunting loads, but I've never had good accuracy results with them, or put another way, I've always been able to improve group size by going to another primer.

The WLR's are noted for being pretty hot, which means that a 5% deviation would make for a lot more difference at the muzzle than a 5% difference in a cooler primer.

The Federal Gold Medals cost more, but do offer better shot to shot consistency (accuracy) than the WLR's do.

I really like Remington's 9 1/2 primers these days. I'm getting good results with the IMR powders using these.

With Hodgdon Extreme powders, I've had great success with CCI's BR (bench rest) primers. I don't know why this may be, and since I haven't done extensive tests with the CCI BR's and Hodgdon powder (other than Varget) I'll leave you to do your own testing--not a bad idea anyway.

The new Nosler #5 says that with 140 grain bullets, the .284 likes RL15 best, with charges from 44 to 48 grains.

Best of luck,

Dan

WLR is like a magnum primer. I think you would be better suited using the 210 Fed.

The WLR is generally considered a "hot" primer, and the F210M is figured as a mild, match type primer, but, in numerous test strings, the 210M consistently produces higher velocities than the WLR.

The more I fool around with them, the more I'm convinced that 'primers is primers', and it doesn't really make much difference which one you use, except in the fairly small cases, (under 30 grain capacity), or large (over 60 grain capacity). Somebody in here says, when asked his primer preference, "whatever is cheapest".

Not to say that they aren't an important component, or one that can be changed out without worrying about its effect on a load, but, generally speaking, except for some really unusual instances (loads using Varget just work better with CCI's BenchRest primers, for instance), you're not going to cut group size in half by changing them.

In my 284, 52 - 56 of one of the 4350's and 150 grain bullets usually works pretty well. I'm currently using 54 H4350/154 Hdy Spire/WLR (ummm, because that's the first box I grabbed) for around 2900 FPS and decent accuracy in a M70 Fwt w/22" barrel.

R-WEST

I have used H414 powder with 140 grain Nosler Partitions and Remington 9 1/2 Magnum primers. (Tight groups) I have used up to 53(fifty-three) grains.
As always your mileage may vary so start low and work up as your components will surely be different than mine.

I started off reloading by trying to choose the correct primer for each load. I got so wrought up in that correctness that I got more confused with every load. Now I use only Fed 210M or Fed 215M, and my accuracy was never better, and I have never had a missfire. Good shooting.