rcmodel...thats an interesting thought...been pondering all day (read the reply this morning)
The SpeedLock speeds up lock time by using a lighter firing pin...that part wouldn't effect bolt lift...but it also likely uses a little stiffer spring too, and you're right...that will effect bolt lift.
I had not thought of that...Thing is, one of these rifles came from the factory with a bad striker spring (my sons), it has had a lot of misfires (light strikes) and I'm certain it is the spring because I measured the firing pins in both guns and their protrusion through the bolt face (.054" on both)...the springs however are very different, one is over an inch longer than the other (free length) and is noticeably stiffer.
I ordered 2 Wolff springs because factory springs proved hard to find...the Wolff Springs are +2 lbs. though...which will also effect bolt lift some, but I'm hoping not much.
Factory springs are 23 lbs...the ones I ordered are 25...you can get up 30-32.
The SpeedLock sounds nice, and probably is...but I'd like to know the spring weight before committing to it.
Thanks rc...