Scenar, you mentioned the .308 is 6oz lighter. Do you know what the weight of your rifles are with the S&B?
Slg,
This is a GAP 308 with a Schmidt.
If I remember correctly, Pat's ran about 3 oz lighter than mine due to a slightly smaller barrel contour. Pretty insignificant difference IMO. Roughly the weight of a cartridge or two.
We weighed/compared them during the Spring shoot.
The 6 oz difference is between the 260/308 is due to the larger hole in the barrel(308) weghing less than the smaller hole barrel with the same exterior contour.