Magnum primers and H335, H380

[mag41vance]

I noticed, that most Speer data calls for magnum primers with H335 & H380. Is that a rule for these powders?

[bgjohn]

I noticed, that most Speer data calls for magnum primers with H335 & H380. Is that a rule for these powders?

I just use Winchester Small Rifle WSR, & WLR primers with no problems in T/C Contenders & xp-100's.
JM

[ricciardelli]

No.

[Lone Star]

H380 is heavily coated with deterents, and Hodgdon lists Winchester LR primers in its data for H380.  However, Win LR primers are among the "hottest" primers available, certainly stronger than Remington or Federal LR primers; they are listed for both standard and magnum use.  Some reloading manuals list magnum primers for these powders, and they should be used when using the corresponding data.  In cold temperatures, magnum primers can help with better ignition/burning of hard-to-ignite powders.

[BCB]

mag41vance,
Over the past 15 or so years I have used much H-335 powder.  As a matter of numbers, I am presently about to finish my fourth 8 pound keg of the stuff.  Although I have experimented with magnum primers of various manufactures, I only use standard primers with it.  I certainly have found no need for the magnum primers.  Good-luck...BCB

[Chainsaw]

magvance, I think you are going to get a confusing mix of answers on this one. The answer may not be completely clear as many factors come into play on this question. Ambient Temperature will make a difference as will the amount of powder you are using in the case. Another factor will be the individual lot# of the primers you are using. I read an article some time ago on how one manufacturer did an exhausting test of all available primers in an effort to catalog the coolest to hottest burning of the mix. After establishing a rating, more primers were purchased and one of the coolest of the last bunch turned out to be the hottest of the new batch. This is the crux of the problem for many when trying to answer this question.

Same goes for different lot #'s of powder.

FWIW, Here is how I do it. I load with mainly ball type powders and as a rule have found for *MY* loads that Magnum primers work the best as far as accuracy and velocity are concerned. I do though live in Taxconsin where most of my hunting is done in weather below 30 degrees. I do shoot though in warmer temps and have not run into any pressure problems with *MY* loads because of the temperature increase during the warm weather months.

If I find a load I like, I purchase a thousand primers of the same lot number and the majority of my powders are purchased in 8 bl. containers so as to alleviate the lot # problem from cropping up with the powder as well.

As always YMMV, and remember my opinion is as irrelavent as the next guys ..............Chainsaw