My R2.5 Long Version with a FX Smooth Twist barrel
I got my FX 25 cal Smooth Twist barrel blank Monday and had it mounted on my Edgun Matador 25 cal Long Version Wednesday morning. The FX barrels are blanks, the in lead isn’t cut, and they are not blued. The muzzle end is crowned. I always redo the in lead anyway so it not having the in lead done was not a big deal. I was going to polish the crown but, I got in a hurry to shoot the gun and forgot to polish it. I gave the barrel a real good cleaning and then pulled an oiled patch thru it.
Went to the range and shot some shots thru my Chrony, 915fps. I thought, wow, this FX barrel gave me 30 fps! I like to shoot 25.4 grain JSBs at 885 so, I had to turn down the hammer spring tension some. I was not happy with the 50 yard groups that I was getting so; I pulled a couple dry patches thru the barrel and tried shooting it dry. The fps dropped from 885 to 855 because of the dry barrel. I had to reset the speed to 885. The groups were better dry so I kept shooting it that way.
I next tried making some adjustments as I wasn’t happy with the groups that I was getting. The groups kept getting a little better as I tried different things like, adjusting the shroud’s tension, the tightness of the barrel screws and barrel clamps. I also tried rotating the barrel 1/8th of a turn, at a time, shoot it some and then rotate it again. The barrel’s accuracy would start falling of every 50-75 shots and needed cleaned again. I tried pulling an oiled patch thru and the fps was back at 915. The FX barrel must have some friction in it, possibly from a tight bore? The fps for the BSA barrel stays the same dry or oiled and the BSA’s bore is actually .243”. I pull a couple of dry patches thru the BSA once in a while. It doesn’t seem to make a difference in the way it shoots. The FX barrel may need breaking in although it seems to me that a soft lead pellet isn’t going to do much to a steel barrel.
I went to the range again this morning. The wind was around 8mph and gusty. I tried to shoot between gusts. I gave up after about 2 hours. Around 6:00 tonight, the wind had died down so, I went back out. I shot 24, 50 yard 5 shot groups. I always start in the lower right hand corner, shoot right to left, move up a row and repeat. I was pulling a couple of dry patches thru every 40-50 shots.
I wasn’t happy with the groups on the first target. Some of my 100 yard BSA targets look better than that one. On these targets, each “leg” of the cross measures 9/10th”.

On the second target, I pulled an oiled parch thru before shooting the 7th group. On the 8th group, the last shot was low because the Matador came off of the regulator. On the top row of groups, I could barely see the target because it was getting almost too dark to shoot. For the last group, I had to prop a flashlight on a roll of Duck tape to light the target. As of right now, the FX barrel likes an oiled bore better than a dry one. I might have to try oiling some pellets and see how they shoot. Right now, the BSA still is more accurate but, the FX is closing in. I am also thinking about pulling the barrel and polishing the crown.

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I gave up on the FX barrel and put the BSA back on.
The FX was just too spotty, it would shoot one or two good groups and then go shotgun on me. I could not get it to shoot consistent and I tried all of the tricks that I could come up with.
I must have put 500-600 weight sorted JSB pellets thru it. I want to go hunting tomorrow and I just didn’t have any trust in the FX barrel.
I went to the range to chrony the BSA barrel and get it sighted in. The BSA barrel was shooting 876 fps and I had the Matador/FX barrel combo set at 885 fps. I turned it up to 885 and the groups were as good as they were before I tried the FX ST barrel.
I am good to go for tomorrow.
I have read, on the Yellow, that Benchmark is now making 3 groove, taper lapped, 25 cal air gun barrel. The barrels are .750 OD and if I can get them to turn one down to .553″ or .609″, I want to try one.