[Veritas1911]

I was reading on the link below that the CG63 bolts were changed. It stated that the "...distinctive vertical thumbpiece was removed from the bolt to increase lock time."

Is this correct? If so, I'm not sure what piece they are referring to. Surely they don't mean the safety do they? Also, it seems to me that any modification of a bolt's design would impact it's safe functioning.

Were these just modified standard bolts found on M96s or are these bolts especially designed for the CG63?

 

[Baribal]

They shortened the tail of the cocking piece, removing the 90 deg. thumb catch.
I really don't see how this could have improved lock time, though.

They did use the same safety lever, without alteration.

 

[swede]

Same bolts used on all Swedish mausers ( straight or forged down ) . The thumb extension was removed from the cocking piece & it was shortened . The firing pin was shortened to match the new length of the cocking piece . I assume the theory would be a lighter weight behind the firing pin spring would make it fall faster . You could not measure it with your watch , but in fractions of a second .

By the way , your book by " Poyer " is full of so many errors that is not worth the paper it is printed on . There is only one book worth buying ; " Crown Jewels - the Mauser in Sweden " by Dana Jones . Do yourself a big favor & trash Poyer's book before you use it to make a purchase & get ripped off .

Please do not quote it as a source on this forum & mislead new collectors .

 

[JIMMY C]

Here are a few photos to show the differences between a standard Swedish cocking piece and firing pin and a CG/63 modified unit. The idea was removing part of the cocking piece and part of the firing pin made the unit weigh less and thus the firing pin spring would be able to move the unit quicker, this decreased lock time. Yes, any increase would be VERY small, but an increase is an increase!

CG/63 modified cocking piece and firing pin.

Standard Swedish cocking piece and firing pin.

 

[Baribal]

Well, being a mechanical designer, I am aware of speed.
But by cutting the weight, you also lower the inertia of the firing pin (by removing weight). Using a stiffer spring will make it faster.
Anyways, this change, to me, looks more like a practicle thing (just like they did with the hunting rifles) than a performance improvement, not useless, though.

 

[JIMMY C]

Loss of Inertia was not a problem. In precision shooting the shorter the "lock time" the more accurate your rifle will be. Sometimes it may actually help, and sometimes just thinking it will help your accuracy makes you a more accurate shooter.

 

[swedeM63]

CG63 lock time

The cocking piece modifications have several effects. Mass goes down so the firing pin drops quicker. Firing pin travel is reduced 8 mm so the firing pin has 35% less distance to travel (but total travel time does not go down 35% since it is from a standing start and the "fast" length of the travel is what has been removed). The firing pin spring is also under greater initial compression from what I can see on my CG63.

More force on the pin + less inertia + less distance to travel = a big difference. Those picky target shooting Swede's knew exactly what they were doing.