GURPS It's Always GURPS

With the Mosin conversion we get...

7.62x54mmR.  7d pi damage, 5+3 Acc, 1,000/4,200 range and either 5(2i) or 10+1(3) shots.

With the savage package we get...

.243 Win.  7d-1 pi damage, 6+3 Acc, 840/4,300 range and 4+1(3) shots.  8.5/0.2 lb.
.270 Win.  7d+2 pi damage, 6+3 Acc, 950/4,100 range and 4+1(3) shots.  9.3/0.3 lb.
.308 Win.  7d pi damage, 6+3 Acc, 1,000/4,200 range and 4+1(3) shots.  8.7/0.3 lb.
.30-06.  7d+1 pi damage, 6+3 Acc, 1,100/4,300 range and 4+1(3) shots.  9.3/0.3 lb.

All that's left to compare would be the weights.  The Savages are 8.3 lb. empty in .243 and .308; and 9.05 lb. in .270 and .30-06.

The Mosin started at 8.7 empty.  The wood is 3.1 lb.  The ATI stock is 2.9; Archangel is 3.8.

So 8.5 and 9.4 empty.

The trigger is a net zero change.

The scope mount is 0.1 lb.

The scope and rings are a pound.  Bringing the Mosin project to 9.6 or 10.5 lb empty depending on stock.

GURPS uses loaded weight so 9.9/0.3 and 11.1/0.7 for the ATI and Archangel respectively.