Choke removal and accuracy.

[look no hands]

Funny you should say that about HW barrels not being choked. I've always believed that and stuck by my opinion that the only "choking" on HW springer barrels is imparted from the crimping of foresight grooves.
However, I was royally shot down either on here or the "other" forum less than 2 months ago by those who stated without doubt, and seemed to have some proof, that they were.
I suppose with this being in doubt, after all that, all I can say categorically is that I've shortened HW and Diana springer barrels with no loss of accuracy.

You mention about shortening Diana barrels as well, I was very tempted to shorten the barrel on my Diana 34 but after pushing a pellet through the bore I found the tightest choke on any of my rifles, you really do have to give the pellet a really good shove to get it out the end, I'm now reluctant to do so.

Pete