Paintball

[ironchef97]

I have a nelson pistol which is very similar to a redux, and I would love to hear some input on how to improve its shot to shot consistency.

Specs:

Barrel length - 6.25"
Bore - .692"
Air location - 12-gram in-handle
Main spring - 2" long, light/medium stiffness
Valve Spring - 1" long, and appears to be "medium" stiffness
Powertube - .195" ID x 0.251" OD x 2.06" Long (past the collar). It has 2 large and angled ports.
Hammer - Stock nelspot hammer (Part 13 in the pic below)
Bolt - Nelspot bolt with a hex head adjuster (similar to Part 15)



The piercing pin is angled towards the cupseal and is located very close to it, I guess you could say it's almost a straight shot from the pin to the inlet ports of the powertube.


I put all the data into a spreadsheet on google accessible at the link below.

https://spreadsheets.google.com/ccc?...CO2N2scM#gid=0

My question is what should I do to improve my shot to shot consistency? I would love to get 25-30 CONSISTENT shots, rather than the 35 shots with the first 8 in the 280-260 range, and the rest in the 230-250 range.

Some things I have considered are:
-Milling my hammer further to reduce weight, possibly copying the Lapco design. I don't have an accurate scale to measure the weight in grams yet.
-adding a valve sleeve

Is there anything else I can do? Also why is my shot velocity curve sloping downwards? What are redux users doing to get their shots a consistent velocity throughout the 12 gram?

[CJOttawa]

Hey pal!

I'll bet donut money the single biggest problem you will have is the HUGE bore size.

Try paint that's consistently 0.697 in diameter or somehow downsize the barrel, if possible. (insert, sleeve, new barrel etc)

[PB Weasel]

Yeah, I hate to just repeat what CJ said, but the issue seems to be the lack of an under-boring method for such a barrel. If the gun has got an in-grip style 12ies changer than yes to the valve spacer, or dare I say it a de-volumizer (sp?). I know my redux has really benefited from having the valve chamber volume reduced . . . . *cough* 54 *cough* . . . That is all I'm gonna say.

[ironchef97]

Originally Posted by PB Weasel

Yeah, I hate to just repeat what CJ said, but the issue seems to be the lack of an under-boring method for such a barrel. If the gun has got an in-grip style 12ies changer than yes to the valve spacer, or dare I say it a de-volumizer (sp?). I know my redux has really benefited from having the valve chamber volume reduced . . . . *cough* 54 *cough* . . . That is all I'm gonna say.

Ok how about this...pics of my whoosh baby for the secret to the number 54?

[russc]

you should look up the threads about nelspot/redux valve diffusers. A few hot shots at the start of a cartridge, with a relatively steady low-medium velocity for the rest of the cartridge indicates you are siphoning liquid out of the cartridge.

[ironchef97]

Yea I started reading some of them, but I wasn't able to make it through all of them last night. What was the recommended procedure for going about making one? diffuser holes towards the rear of the diffuser shell?

[PB Weasel]

Originally Posted by ironchef97

Ok how about this...pics of my whoosh baby for the secret to the number 54?

LOL extortion now huh? I like how you do things sir . . . . I could PM you the secret, though I doubt it would help you much.

[CJOttawa]

Originally Posted by ironchef97

Yea I started reading some of them, but I wasn't able to make it through all of them last night. What was the recommended procedure for going about making one? diffuser holes towards the rear of the diffuser shell?

It's actually more simple than that.

The primary purpose of the valve insert is to prevent gas from going direct from the in-grip inlet to the powertube ports.

Solex has a great photo montage of his, here:
45 frame for NELSPOT


Mine's here:
Redux Valve insert - success


Go with Solex's design. There just needs to be a way for gas to go from the outside of the insert to the inside.

[DSA]

Originally Posted by cjottawa

Hey pal!

I'll bet donut money the single biggest problem you will have is the HUGE bore size.

Try paint that's consistently 0.697 in diameter or somehow downsize the barrel, if possible. (insert, sleeve, new barrel etc)

Agreed but I am doubtful you will find quality paint in excess size of 68.5, that being said, is freaking the barrel an option? When I shot my famous 47 I was sporting a 68.9 insert but after switching over to a 67.9 with the same paint I see more shot consistantcy accompanied by more ball breakage. It's really a process of elimination and making a decision based on priority. A tighter bore will undoubtedly yield more shots but may also cause more breakage. On the flip side if you can live with 15 good shots and zero ball breaks by all means go that direction.