It depends where you shop. Here in the US I can usually find a good deal on the Sierras. Current prices in US Dollars from MidwayUSA
http://www.midwayusa.com : Sierra 107gr $18.25, Lapua 108gr $23.20, Sierra 142gr $20.18, Lapua 139gr $25.51
Regarding bullet construction, I should have mentioned that I have heard the Hornady A-Max is not tough enough for silhouette. I have not used it myself. I couldnt get it to group out of my hunter gun, and havent bothered to try it in my new 6.5TKS.
Paul, with the difference in hardness you found between Sierra and Lapua did you observe any difference in the velocity you could get before running into pressure signs? Now that I have a rifle with the right twist and throat for the high BC bullets I want to give the Lapuas a try, but I suspect I may have some problems with tough bullets in a seemingly tight PacNor barrel and the tiny TKS case.
- Jim