Large Rifle primers vs Magnum Small Rifle primers

[bwaites]

I'm no reloading expert, and I'm trying to figure out if there is much difference in the two so far as ignition, etc.

I reload for 6.5, and there are 2 types of brass available, Lapua and Wolf. Lapua has small primer pockets, Wolf has large. I have quite a bit of brass from both, but should I run the same loads in each? Does the large primer require cutting back the powder load?

Bill

[goodgrouper]

You are loading for what 6.5mm? The 6.5x47 uses Lapua brass and unless it was the initial run it will use small rifle primers. All other 6.5mm's I know of are large pocketed except for the oddball wildcats based on small cases.

In any case, the large rifle primers have more compound in them and I would venture to guess that they have hotter ignition sparks but I could be wrong.

[bwaites]

6.5 Grendel. Sorry, I meant to type that in, (I did in my head, but I guess not on the screen!).

Bill

[goodgrouper]

Yep, I know how that goes. Brain moves faster than my fingers (thank goodness!).

So the grendel. I forgot about that one. If you are going to form your cases from 220 russian brass, go with Lapua for sure. I don't know about Wolf but Lapua brass is king in the russian. And it is a small rifle pocket. That small of case capacity absolutely does not need a large primer or even a magnum small rifle primer at that. I would go with the Fed 205 primer if you can find them. Good luck.

[bwaites]

Lapua makes Grendel brass, both for themselves and with Alexander Arms headstamp. Identical otherwise. This brass comes with a small primer pocket.

Wolf also makes Grendel brass, which I suspect is simply reformed 7.62x39 brass. The Wolf has a large primer pocket.

So I don't have to form brass, it's already done. I just have to figure out the most cost effective way to get the job done!

I have loaded both, I load the Wolf brass a little light because of the larger primer, but there really isn't a source that identifies if the Magnum small primers (which is the recommended primer for the Lapua brass) and a standard large rifle primer are roughly equal.

I wondered if there was much difference, or if I should just continue my lighter loading practice. The Grendel 6.5 is notorious for NOT showing pressure signs, so there isn't a good way to use them as a guide.

Bill