Ballistic Coefficient for JTS Pellets
- By cavedweller
- Projectiles
- 30 Replies
.062 For the 33.8 / .25’s.25 33.8 too, if you can.
Upvote 0
.062 For the 33.8 / .25’s.25 33.8 too, if you can.
It makes sense! Thank you for taking the time!A flat valve seat can be harder to get a good seal at lower pressures, yes. When made correctly with a correctly made poppet, it’s not a big issue. Tapered seats are more reliable and that is why they are produced that way…less returns. The trade off is a poppet that is harder to unseat. Flat is easier to unseat as well as using a peek poppet is easier to unseat (and harder to seal properly but when done correctly, not an issue).
Those two things allow for less hammer needed…clip the coils and you are back (sorta) where you were with less cocking force needed.
The smaller diameter stem works because I made a new valve and drilled that hole to match. The smaller stem decreases the closing force (and speed) of the stem/poppet while allowing more flow in the throat area. This allows a bit more dwell time.
That is a generalization of those changes, hope that answers your questions.
Dave
Are you sure about upper statment?![]()
That's how many deal with another's success brought on by hard work.The local Rimfire group has found an effective way to deal with me. They deemed my air rifle an unfair advantage and created a class for me to shoot by myself.
Mike