No go gauge

What brand are people using for their go/no go gauge for their 22LR? Links please, need to order one

 
I usually insert a 22 LR catridge close the action and see if it goes Boom. Check a 5-10 shot group at 50yds.

Latest is a Winchester 52D with a Winchester branded 1.25”Hart barrel.
One of two in existence.
I received it about 2 weeks ago in 100% condition, Even the bolt is engine tuned.
Roll over cheek piece is removable for Bolt removal.
Standard Winchester bottom rail.
Trigger is 1# 2.4oz with no creep and after travel!
Scope is Leupold 36BR.
Group is ELEY CMP, 10 shots at 50yds.
-Richard
 

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