First, I have done some reloading, but always followed powders and bullets directly from the reloading manuals. I haven't stepped out of that much. So input is appreciated.

I have a 280 Remington.

I have previously worked up a load using AA-3100 powder. My best grouping was using 55.5 gr and a 160 grain Speer bullet. From things I have read AA-3100 is similar to H4831 or IMR4831, but I have always used the AA load data for safety reasons.

I had a friend recommend the Swift Scirroco 2 and for 280(7mm) it is 150 grain. I am giving it a try.


In the AA reloading data, generally I can start around 52 grains and go up to 57. They have bullets listed for 154. Based on other bullet weight listings, I can be from 51 to 57.

I know I can change to a different powder and follow the swift manual, but would like to use up the AA-3100, I have most of an 8 lb jug.

Here is my dilemma. I started low at 52.0 and went up in 0.5 increments. At 54.5 the load becomes compressed, as the swift bullet is longer than other bullets I have loaded in my 280. I compared it to the Speer 160 and it is longer, hence giving ancompressed load at lower powder charge. I stopped at 56.0, so I have compressed loads of 54.5, 55, 55.5, and 56. I will start at the bottom (52.0) and shoot each step up and monitor the casings for over pressure, stopping if I need too.

I am not very familiar with compressed loads. Would I be safe shooting these? Obviously I will start on the low end and check for pressure signs as I shoot each step up. Based on the load data I should be in the safe range. Can I get some input on the compressed load?

Absolutely nothing wrong with compressed loads.....and as a matter of fact, one can load 1/2 the charge and compress that and then add the balance of the load and further compress that. Just work up as if there was no compression and watch for warning signs as always.