Seafire -

Most ammo manufacturers don't like low load densities with ball powders, so one can see where Winchester is coming from re 748 in the 270. That, and the fact that W760 is so great in it explains why they don't recomment 748.

Actually 748 is right next to Varget on the burn rate chart, so it makes sense for mid-weight reduce loads.

PS: I am quite Liberal but that makes me so tolerant and reasonable that your banner makes me smile!

Seafire,

I am sure a 270 will be Ok with 748 due to its small case capacity and doubly so the loads you are using are well below what you could use in "theory" with the 748 burn rate and 130 grainers.

HOWEVER, there can be a trap if trying to work up full power loads with ball powders that have a burn rate that is too fast for maximum results.

What can happen is that you get hangfires that are so minature in nature that you do not notice them. However, they result in lower pressures than should be the case for the charge/burn rate/calibre/bullet weight. This in turn can allow one to increase the load above what the maximum should be for the charge/burn rate/calibre/bullet weight while showing low pressures. Then as the charge goes up further and a bigger percentage of the case capacity is used you get normal ignition and of course an overload.

I see from some of your other postings that you play about quite a bit with reduced loads and other "non normal" loads and you are probably aware of what I have mentioned. However, some readers may not be aware of the potential problem so I though I would mention it.

Mike