Originally Posted by
cougarmeat
As to the amount of bury "shrinkage", I think 1 inch per 4 inches of bury, for 7/64ths Amsteel, is close. There are formulas at various websites and videos; they depend upon the diameter of the line.
The for the question on the ridge line dog bone - you didn't mention the size of your loops. To the lengths easily measured, I add one inch for a four inch bury (a little more for 5 inches, etc.) and about an inch on each end to cut a taper. For an 8 inch loop with 5 inch bury, that would be 16 inches for the loop, plus 10 inches for the bury, plus 2 inches shrinkage, plus two inches taper for a total of 30 inches.
The dog bones are tricker because you have bury and loop diameter length. If you want a 9 foot dog bone with 2 inch loops and five inch bury that would be: 9 foot for the length (to start of loop), plus 8 inches for two 2 inch loops, plus 8 inches for two 4 inch buries, plus 2 inches for two tapers, plus about 2 inches for both bury shrinkages. So 8 + 8 + 2 + 2 = 20 and 9 x 12 = 108 so that would be 128 inches for a 9 ft line with a 2 inch loop on each end and 4 inch buries.
It would be nice to have a "sticky" with formula information or some standard sizes (like 8 inch loop) of different diameter line (7/64, 2.2mm, 1.75mm)