I need to order bases and rings for a 6.5x55 Sako Finnlight ST and aren't sure which bases I should order. The Opti-lock bases are available in S, L, and EX (extended) sizes but I'm not sure if I need the S or L as the 6.5 is built on thier medium action.

I'll be putting a Weaver Super Slam 2-10x42 scope on it and think the 1" low rings will work but I have read about ejection issues, should I use medium rings instead?

I know that Leupold offers rings as well but I want to stick with the Opti-lock bases and rings.

Thanks in advance!