Try a proven accurate slug before beating yourself up over the barrel. Hunters Supply are not known to be accurate in air guns. These 70gr. from Nick would be worth trying in that barrel- https://nielsenspecialtyammo.com/collections/257-cal-ammo/products/70-grain-hollow-point-boat-tail-air-rifle-pellets-257-caliber-air-gun-slug-swaged?variant=12508022145117If they shoot well then Arsenal makes a BT version of 258420 mold- http://arsenalmolds.com/257-Bullet-boattailI wouldn't rule out the barrel until trying a slug better suited for it and made of soft lead.
Now that will be interesting. Roachcreek
And I have my original ballistic printout sheets that I printed out just before the 615 yard video, thus will be interesting. Both my .257 TJ/Haley barrels, 1-10 and 1-14, were 36 inches long.RC
Probably splitting that barrel was the best thing for it. RC
Great build. I’m certain that you will have better success with that barrel and length. Maybe I missed it but are you going to use a barrel band or free float this one?
I love it. I know many will disagree on how 42 inches can be sleek but it sure is. I really don’t remember the length of my Haley 257 with the 36 inch barrels plus flash hider. I did not refer to it as being sleek. Well done,Roachcreek