I recently re-sized some 270 cases to 25-06. The cases were run through a FL resizer and I want to fire-form them to my gun. I didn't want to burn the powders I use on a regular basis as my stock is running low (call me cheap) but I have some WW748 powder kicking around that I may never use. I thought it might be a candidate powder to use for fire-forming the cases. I have plenty of different weight bullets to choose from.

I was wondering if any one had any WW748 load information they could share related to a 25-06? I haven't found any reference whatsoever linking WW748 to 25-06.

I couldn't find anything for a 25-06 either. Even a case small as 250-3000 the win powder that's recommended is 760.

The trouble with your plan is ball powders sometimes do funny things in reduced loads.

Not worth it. Do any of your friends reload that might be interested in trading powder surpluses?

I couldn't find any either. I do see IMR-4064 listed though. Is close in burn to 748. I might try a start charge weight of that. Check a few orther cartridges of similar size and read between the lines a little and see what you think of that flash?

Cheezywan

I'd avoid it, just because ball powders don't respond predictably when mis-used that way. It's exactly the reason you don't find data for it - it's not a good idea. So I second Ole1830's comment: offer that 748 as a trade. A stick powder like 4064, 4895, 4320, RL-15, Varget or several others would be MUCH better candidates.

Slow burn powders up to h1000 are used for the 25-06. I could not get a load to calculate that was acceptable even with a 70 grain bullet, using 748 powder...this has already been said, use imr4064 or even 4831 and the loads are more abundant...this is a link to a place that now has a very good price on powder.

http://www14.inetba.com/tandtreloading/index2.ivnu

Uh huh. When fireforming, It is often not only acceptable but desirous to use a somewhat reduced charge of a slightly fast powder.

But 748 goes beyond what a prudent reloader what call "slightly" for the 25-06. Me? I'd use a 90% of max load for your bullet with a proven -but slightly fast- extruded powder.

How much 748 do you have? I've got unopened pounds of RE22, RE19, IMR4350, and opened pounds of RE15, AA3100, and some other stuff too...

I really don't know if its a law, but I'll get them in some decent packaging and just not worry about any kind of Haz-Mat charges. I think thats totally bogus that they want $25 extra to ship 1lb of powder.

I only have about 3/4 of a pound. I bought it to use for a 30-30 until I gave the gun to my son-in-law. I've since sold the dies and have no use for the powder.

Well its up to you if you want to trade...

Why not just use a starting load of a powder and bullet combination that you intend to work with? That way you get a head start on your load development without wasting time 'fireforming.' All you have really done in necking down from .270 to .25-06 is to neck down. There should be no significant changes in other dimensions that would indicate a need to fireform.
Concur with the others, don't try 748 in this combination.

The case gets run through a full length resizer during resizing. After fire-forming I just neck size. You must have missed in my first post where I said I was cheap. :)

Find somebody that has a 204 or 223 and trade it to them. Using 748 ball in the 25/06 is not worth the risk. As mentioned ball powders do funny things in the wrong circumstances. Remember 785, the one W_W pulled many years ago? Reason---erratic pressure curves.