Hey Guys,
as you may know, I have my JT Barrels in form the shop. I had mixed opinions on what to get. Some said ALL 3. Some said 688 and 690. And other told me to get it with as much difference as possible, to either with a 2 combo 686 and 690, or 3 combo 684 688 and 692.
I decieded to go with a 688 and 690 since I shoot mainly Marbs. 688 is a perfect fit, while a 690 will be my backup in case they swell.
The results at the field. They paintmatched the exact same. Paint went through them rather easily. It seemed to me that the 688 bore on my JT seemed bigger than my Standard Boomy 688. Wierd. On the chrono, with both paints, the 688 and 690 got same velocity readings and variances (I did notice that my +/- 3 fps stayed with me majority of the day versus with my Boomy which would get bad results after 1/2 a day of swollen paint).
So what does this mean? Is the 688 and 690 same size? Did the machining lack precision, and they are actually the same bore size (my bro said machine lathes do have the precision to consistenty make these bore sizes repeatedly hmmmm...)?
I am thinking of using the 690 mainly, and returning the 688 and swapping it for a 686, for smaller paints like the Diablo and Allstars. Good Idea?
Let me know your opinions.
-Hyper
as you may know, I have my JT Barrels in form the shop. I had mixed opinions on what to get. Some said ALL 3. Some said 688 and 690. And other told me to get it with as much difference as possible, to either with a 2 combo 686 and 690, or 3 combo 684 688 and 692.
I decieded to go with a 688 and 690 since I shoot mainly Marbs. 688 is a perfect fit, while a 690 will be my backup in case they swell.
The results at the field. They paintmatched the exact same. Paint went through them rather easily. It seemed to me that the 688 bore on my JT seemed bigger than my Standard Boomy 688. Wierd. On the chrono, with both paints, the 688 and 690 got same velocity readings and variances (I did notice that my +/- 3 fps stayed with me majority of the day versus with my Boomy which would get bad results after 1/2 a day of swollen paint).
So what does this mean? Is the 688 and 690 same size? Did the machining lack precision, and they are actually the same bore size (my bro said machine lathes do have the precision to consistenty make these bore sizes repeatedly hmmmm...)?
I am thinking of using the 690 mainly, and returning the 688 and swapping it for a 686, for smaller paints like the Diablo and Allstars. Good Idea?
Let me know your opinions.
-Hyper