Crossman 1720T

Finally set my 1720T up for FT
Zero at 35yards - super quiet
And
Crazy accurate for a pistol!
70986190075__7AEF03EF-99C9-44ED-B8CB-B70520FC0D29.jpeg
 
Very nice! Any chrony numbers? Mods?
My current 1720 configuration is shooting at 11.56fpe with Crosman 10.5gr pellets. Talked with Roy at Mountainair Custom Airgun and he recommended not adjusting the hammer stroke on a regulated 1720. So, the hammer stroke is fully CCW (against the stop). Didn't count turns on hammer spring adjuster.
Here are the details:
Configuration:
0.105” TP
Huma Regulator set at 1740psi (120bar)
Hammer Spring at ?
Hammer Stroke at zero turns CW from full CCW
DonnyFL moderator adapter
TKO Moderator
Starting fill 3000psi
Pistol gauge at 1740psi (regulator set pressure)
Altitude – 7126ft
Barometer – 23.21inHg
Temp – 69*
Pellet – Crosman Premier 10.5gr
Shot count: 10
Low: 702
Hi: 705
Avg: 704
Spread: 3
STD Dev: 1.1
1701-1720 Conversion.JPG
 
My current 1720 configuration is shooting at 11.56fpe with Crosman 10.5gr pellets. Talked with Roy at Mountainair Custom Airgun and he recommended not adjusting the hammer stroke on a regulated 1720. So, the hammer stroke is fully CCW (against the stop). Didn't count turns on hammer spring adjuster.
Here are the details:
Configuration:
0.105” TP
Huma Regulator set at 1740psi (120bar)
Hammer Spring at ?
Hammer Stroke at zero turns CW from full CCW
DonnyFL moderator adapter
TKO Moderator
Starting fill 3000psi
Pistol gauge at 1740psi (regulator set pressure)
Altitude – 7126ft
Barometer – 23.21inHg
Temp – 69*
Pellet – Crosman Premier 10.5gr
Shot count: 10
Low: 702
Hi: 705
Avg: 704
Spread: 3
STD Dev: 1.1
View attachment 369200
Very nice! only 10 shots though, or is that how many you shot on the string?
 
Very nice! only 10 shots though, or is that how many you shot on the string?
I just checked the tune with a ten-shot string. I'm used to regulated PCPs with a lot more air storage than the 1720. So, I'm in the habit of using a ten-shot string to check my tunes on regulated PCPs. As I recall I'm getting a little over 30 good shots before I fall off the regulator on the 1720.
 
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