Can changing a stock alter your average FPS?

[dig]

More than likely the chrony. Where you shot through the chrony and angle can make a difference, also temp of the chrony itself, slight angle changes, atmospherics, humidity. On hot day I get a difference of 40-50 ft with ammo out of an a/c vehicle through my Chrony alpha. Not to mention difference in primers, powder lots, bullet lots, barrel wear, brass, it's endless.

[Mikecr]

I agree with all said.

Anything affecting rearward recoil affects MV. But it should not be so much as you observed.
That brings the chrono into the mix also.

[Swifty]

Originally Posted by AZShooter

Did you shoot with the new stock right after chrono'ing the old stock? If not you don't have a good control. You cannot say the new stock causes faster velocites.... yet.

Let us know when you test both stocks under same conditions.

I did not chony both stock on the same day. However, I did record the conditions with a kestrel wind meter in both shoots. 1* colder with the old stock and 5% less hunmidity. Pressure was the same. I do admitt though that the chronygraph was not 100% controlled between the shoots. Although it was the same distance, I am sure the angle, time of day, and things like that were not the same. I dont record all of that in my notes, and maybe I should start doing that.

Nevertheless, Old stock back on- I get my old dope back, and it's working. I just shot it at 250yds this morning and got accurate dope.

Yes, I did compare the tow stocks in the area of the barrel lug recess, and found that the new stock had a more loose (sloppy) fit. I am not sure if the savage model 10 series uses a different type of a lug than the model 11 series or even the stevens 200 series.