in airgun world it has a subject on transfer ports

[tjk]

I would just take the safe path and find a pellet that shoots the most efficient, accurate, and stick with that pellet. With experience like Mark has had making the port hole bigger and getting some decent gains, that's great, but I still don't think it would be significant enough for me to try it. I have been known to go over board on some stuff a time or two;) Over tightening was one of my minor faults when I started messing with Airguns a few yeas ago, but I have since learned to curb that tendancy. My question tor increased port performance would be if you could gain anything by changing the path of the air flow. Kinda like the QB port tune jobs some folks perform on them.

[airnutz]

I've read a bit here and there about port sizes, and the porting thereof. 

As I understand, the size of the port is directly involved with the size, meaning volume of the cylinder that feeds it.  There is a ratio that has to be followed or the gun is weak, or it knocks your shoulder loose, this without having much velocity.  The golden middle is the rule, but the math will let you pretty much know ahead of time what will happen.

My question would be about a secondary "release valve" would be, more hardware that may leak energy?

Dangit, I think I'll open up a new seal factory.  robert w has drummed up some new business!

[Mark 611]

tjk I think some manufactures have tried different methods! Diana has an angled port HW's are a straight port {break barrels} so I don't know of anyother way's to try one!