FX Barrel Liner question

[88turbocoupe]

I have another question to ask about barrel liners.
i just got a .25 superior heavy 1:18 700mm liner i used 8 pin gauges ranging from .250 to .247
what i noticed while watching through my bore scope is it seems that the inside of the liner is shaped somewhat like a funnel
each gauge would only go into the barrel maybe 3 in before i had to change to a smaller size.
i also noticed the rifling of the bore was less on the breech side and very noticeable increasing heading towards the choke.
pushed a slugs through very little resistance until the last 3 inches on the liner with slight markings on the slug vs deep cut like the 1:24.
my 600mm 25 liner is the same way but shoots incredible accurate out to 75 yds so far.

 

[bchannell]

I've not actually slugged mine, but I have pushed pellets though it and got what appears to me the same conclusions, as you. The one I have seems funneled too. If I get a chance I'll look at it more critically and see.

 

[6gun]

My cleaning rod feels like my 22 700mm slug liner is like yours. There's less choke on the slug liner iirc. Depending on the pressures you run it may or may not obturate the projectile to fit the bore. Pellets for sure do this. Way back when they were smooth till the last couple inches. Being over analyzing and unable to leave well enough alone myself, the best thing I can say is that if it shoots well don't mess with it much or worry much. We are in a different world with fx stuff. Liners, and impressed rifling vs button or cut rifling is a whole other thing, as are liners that some people take issue with(especially if they're from powder burner world previously like me). I wish you the best of accuracy with yours.