Mainspring Length

Does anyone have the length of an uncompressed short action Model 10 mainspring, or the difference in length between a long action and short action. I ordered a short action spring from gun parts and it appears too long.

Thanks

3.076" out of my model 11 accutrigger, round back, 4.275 action.

A short action spring should have 21 coils. Free length unconditioned- 3.27", length after set-3.12

Thanks. It appears that I was sent long action springs. They are about 4.5 inches long.

Jim