Former11B
28 April 2016, 12:26
https://sierrabullets.wordpress.com/2016/04/20/seating-concerns-with-sierra-tipped-matchking-tmk-bullets/
Might be useful to those who use the 77gr TMK (like myself) and have issues with the seating die marring the bullet. Fortunately, I haven't had that issue. I use an RCBS Competition .223 die that side-loads the bullet and lines it up and seats it in the brass, so no balancing act is needed.
The article mentions two very popular powders for use in conjunction with the 77gr TMK: RE15 and Varget, and how loads seated at 2.25-2.26" might be compressed...since I shoot mostly out of PMags, I load them at 2.262" to give myself a little extra space, in addition to that, I use a longer drop tube and pour the powder slowly to help back it better, but my 23.0gr of RE15 still crunches down pretty good. I have had no pressure signs at all, even with hotter loads (I bumped it up to 24.1gr but the accuracy wasn't there, so I brought it back down)
Anyhow, hope this article is useful to some.
Might be useful to those who use the 77gr TMK (like myself) and have issues with the seating die marring the bullet. Fortunately, I haven't had that issue. I use an RCBS Competition .223 die that side-loads the bullet and lines it up and seats it in the brass, so no balancing act is needed.
The article mentions two very popular powders for use in conjunction with the 77gr TMK: RE15 and Varget, and how loads seated at 2.25-2.26" might be compressed...since I shoot mostly out of PMags, I load them at 2.262" to give myself a little extra space, in addition to that, I use a longer drop tube and pour the powder slowly to help back it better, but my 23.0gr of RE15 still crunches down pretty good. I have had no pressure signs at all, even with hotter loads (I bumped it up to 24.1gr but the accuracy wasn't there, so I brought it back down)
Anyhow, hope this article is useful to some.