I was just given SEVEN POUNDS of the stuff and I've nver used it. Looks like it's close to RL-25 or so? Anybody use it and if so what calibers? Specific load data appreciated as well. jorge

You could take a look at this page:

http://www.lapua.com/index.php?id=850

on the right there is a link to download their reloading guide (PDF). N165 is my favourite powder for the 300WM and the 270WSW; it certainly doesn't allow very high velocities, but gives good accuracy in my rifles.

I have tested Vihtavouri N165 in my 22/250AI, 25/06, and 25/06AI, and found that when used with the appropriate bullet weight it will give good accuracy and a competitive velocity.

I have found that it is about 1.0 grain slower burning than Reloader 22 and H4831sc, and about 3.0 grains faster burning than Re25. I have included some of my data from the 3 rifles below:
22/250AI
69 grain Sierra HPBT
42.0 - IMR 4831 - 3402
44.0 - Re 22 - 3416
44.5 - Viht N165 - 3405

75 grain Hornady Amax
43.0 - Re 22 - 3231
43.5 - Viht N165 - 3231
45.0 - Win WMR - 3276

25/06
100 grain Nosler BT
58.0 - H4831sc - 3232
58.0 - Viht N165 - 3255
59.0 - Viht N165 - 3342

25/06AI
100 grain Nosler BT
58.0 - IMR 4831 - 3469
61.0 - Re 22 - 3501
62.0 - Re 22 - 3580
62.0 - Viht N165 - 3499
63.0 - Viht N165 - 3562

115 grain Nosler BT
58.0 - IMR 7828 - 3281
59.0 - Viht N165 - 3305
61.0 - Re 25 - 3218
62.0 - Re 25 - 3293
63.0 - H1000 - 3271

Good luck and hope that the above is of some help. Brian.