GTA

Airguns by Make and Model => Vintage Air Gun Gate => Topic started by: RodJ on September 26, 2020, 05:06:27 PM

Title: Velocity numbers 312, Racine 342, 392PA
Post by: RodJ on September 26, 2020, 05:06:27 PM

Just some numbers to add to the pot in case someone keeps up with these things.  These are ROUGH averages of 3-5 shots.  I guesstimated the average to the nearest 5fps.  What was interesting is the differences in increase of FPS from one rifle to another from 4 pumps to 6 and then 8.

Benjamin .22 hollow point “discovery” pellets, 14.3 grains
Caldwell Ballistic Precision chrony
85 degrees, indoor


312 Benjamin Franklin
Used / new to me, allegedly resealed a few years ago
4-430
6-490
8-545   9.43 FPE

342 Racine
Used / new to me, no history
4-495
6-570
8-625   12.41 FPE

392PA
Bought new by me (late 1990’s? Maybe 2000’s?), stock
4-545
6-620
8-680   14.69 FPE

Title: Re: Velocity numbers 312, Racine 342, 392PA
Post by: eeler1 on September 28, 2020, 12:25:30 AM

Cool that you posted this.  Seems I’ve seen a repository for this info somewhere?

Title: Re: Velocity numbers 312, Racine 342, 392PA
Post by: RodJ on October 01, 2020, 08:53:31 PM

I think that’s right.  Thought I saw a thread somewhere in which there were a lot of velocity numbers.  Maybe that’s what subconsciously motivated me to put these up.  If I can find the thread, I’ll put them there.  Tonight is “fix the burr in the chamber at the transfer port of the new to me 397PA.  The #17 and #16 drill bits showed up today.

Thanks for the reminder eeler.