Winchester and Remington 357 Primer Size?

jcook01

Hey all

I tried going to Remington's and Winchester's websites for recommended primer size to use with their brass. Best I could do was cross reference at Remington, their new 357mag ammo lists a 5-1/2 primer size, their website lists 5-1/2 as small pistol "doesn't mention small pistol magnum."

Winchester couldn't find anything useful.

So gents, I'm trying to load Winchester 357 Mag brass and R-P 357 mag brass.

I have CCI 500 small magnum pistol primers, can I use them on either of the two brass' listed above?

Regards, John

BHAVIN

357 takes small pistol primers. You can use regular small pistol or small pistol magnum depending on the powder and load you want. This is what determines the primer you use. Check your load book. Your load book should also have a primer cross reference chart. A Remington 5 1/2 is a small pistol magnum primer.

jcook01

Thanks!

So there isn't a difference in brass pockets on 357 mags?

The reason I asked was from experience with 500 mag, brass pocket in 500 mag can vary by manufacturer.

I checked the Hodgdon charts, for Titegroup they list SMP, which is what I have.

Regards, John

HandgunHTR52

quote:Originally posted by jcook01


So there isn't a difference in brass pockets on 357 mags?


Regards, John


Nope. They are all small pistol. The 500 S&W is a special case. (Pun intended).

jtmarine0831

quote:Nope. They are all small pistol. The 500 S&W is a special case. (Pun intended).

That's a good one!

Primers are a funny subject when it comes to reloading. They have alot to do with powder selection, charge weight, heck even altitude and temperature. It is best to try a couple different ones(standard and Magnum) to see if one performs better with your desired load. This is not always the case, but for instance in my pet load for my 7mm Mag. I use Standard Rifle primers because due to the powder I use,the charge weight, and environmental conditions I usually shoot in a Magnum primer burns to quickly. This is just all suggestions cause there is still nothing about reloading that is really set in stone. Just start with recommended start loads and go from there. I salso suggest having several different reloading manuals to reference though since each manufacture usually only research several powders with a few bullets, there simply just isn't enough time to use them all. Good Luck and Good Shooting!!

jcook01

Thanks gents, I worked up a box of 50, several different loads, head to the range this weekend. [B)]

jtmarine0831

quote:Originally posted by jcook01
Thanks gents, I worked up a box of 50, several different loads, head to the range this weekend. [B)]


Good Luck and Good Shooting!

TAXI8mm

I'am new to reloading and new to forums so. I will be reloading a 357 mag with Hogdon HP-38 powder, Winchester WSPM primers, Rem. 158-gr. JHP bullet, And a charge of 6.2 Any comments on this Mix.

bpost

Greetings, welcome to the forums!

You will be fine with that load. To gain more performance from the 357 you might want to try H-110, W-296 or 2400.