Further to my comments below, I did get 4 recently from Badger Ridge. Just changed out a 2nd one a few minutes ago. Of interest; the 4 I received are Rem. 700 SA. About 2 weeks after changing out the first spring, the rifle was suddenly shooting messy groups. Perhaps defined as "globs". It is cold to be sure but this change seemed odd. I came home and using a scale I have designed solely for this purpose; the spring pulled 20-21lbs. Down from 23. I machined a small shim (about .050") and installed it. Pulls 23 lbs 3 weeks ago and 23 today. Rifle also shooting dots again. Perhaps Kelbly's springs might be a better quality. One I had from Pacific Tool and Guage, was more tightly wound, slightly longer and nice quality. Pulled 22-23 for nearly 2 years but really expensive for just one. Be sure when you are done there is no binding on the bolt and I polish the firing pin. 1000 grip or higher.