Originally Posted by trainerKEN
I know Uziel Gal uses DW barrels with his Egos, now he has a SL91... so I have a feeling he's sticking with the SL2 barrel kit... but I bet he would tell you the combo is
I do have a DW barrel, but i actually have it mainly for use on my Autocockers.
I am in the habit of bore matching, simply because I used Autocockers for so long - overboring ruins consistency when using a closed bolt marker, as you are relying on the bore fit to stop the ball rolling down the barrel. If the ball starts from anywhere other than the breech, it accelerates through a different length of barrel, and hence for a different length of time, and you end up with a different velocity.
With any open bolt marker - or any one with detents at least - the ball is always held in the breech until it is fired, so the ball always accelerates over the same length of barrel, and the consistency is drastically improved.
At that point, the only remaining advantage to bore matching matching is that efficiency should be improved. Never a bad thing, and perhaps even more important when using a marker that isn't particularly well known for great efficiency.
Accuracy is something that gets argued back and forth when talking about bore matching, and I can kind of see both points of view here. I have personally shot quality paint with a slight overbore and have had great results. Equally, I have seen paint and marker combinations that have for whatever reason caused the ball to pick up a spin - perhaps the paint wasn't as good as it could have been,or perhaps the marker had only one detent, or maybe the two detents were putting uneven amounts of pressure on the ball - whatever the reason, spin would cause the balls to hook, or rise, or drop early, depending on the access of spin. A good bore fit would at least stop the ball picking up a spin prior to leaving the control section of the barrel.
Now having said all that, even when using paint that is as round and fresh as can be, and not expecting any issues with the ball "spinning up" in the barrel, I'd rather not be shooting small paint through a very large barrel. Having just enough leeway to cater for changes in temperature - and hence changes in ball diameter - or the odd incosistently sized ball, is more than fine by me. I don't want the efficiency hit or for the ball to possibly rattle around in the barrel, or any other things that people may suspect happens when overboring (I have no intention of a getting in to any arguments regarding that, but I am sure most of you will have heard arguments for and against overboring, bore matching or underboring). I just try and play it safe - not too big, not too small.
With that in mind, the three sizes that come with the SL kit, or the Shaft3 upgrade kit, seem like reasonable choices. For any ball from a 0.693 down to a 0.679 ball (which is my most used Freak insert, and has been for a number of years now - paint was already getting very small in the UK while medium sizes were still common in the US) you either have a bore match or don't have to overbore too much with the selection of bore sizes. Of course, TechT are now saying that balls in the US are now getting even smaller than 0.679, so I may have to have a re-think.
OK, that was long and rambling, but hopefully that has given some glimpse of my thoughts about barrels.
So, let's get right back to the beginning, and look at the DW specifically. Weight aside, where you will obviously like a light barrel or a heavy barrel - personal preference - I mainly like the fact that it is for all intents and purposes a one-piece barrel with inserts. Yes, the threaded adapter is attached to a separate carbon barrel shaft, but they are fixed, and if the alignment of those parts is good to begin with, then it will stay good. You then only have to worry about the alignment of the insert to the shaft, which on mine is good. Funnily enough, normally, I actually like a heavyweight barrel, and have a Dye stainless barrel, a couple of Dye Boomsticks, a stainless backed J&J, stainless backed Freaks, a stainless backed Sceptre, and a couple of stainless LAPCo barrels - I just like the balance of heavier barrels, but felt like trying something different, and the DW allowed me to use inserts I already had, and it was relatively cheap.
The only thing I wasn't overly keen on was some compression marks on the outside of the barrel, which obviously have no effect on performance (presumably something to do with the production of the marker), and the fact that the smooth layer of the inner bore of my barrel didn't extend all the way back to the tip of the insert - there is a little rough patch just in front of the insert where you can see the rough weave of the carbon and the uneven surface of the resin binding the fibres together. Thing is though, being directly after the tip of the insert, the ball should be centred in the bore as it passes this rough patch, and so should never come in to contact with it - it looks naff, but shouldn't actually have any negative effect.
Other than that, and not really giving the marker the balance I prefer, I've been happy with the DW.