AO Research Team, Need YOUR Help ASAP!!!!!

[AGD]

Team AO,

We are in the middle of intensive research on the ball chopping issue and think we have made a breakthrough. For a long time we have wondered why some people chop and others don't. It seems that depending on what barrel ID you have, you get more or less blowback and ball bobble. Of course we know bobble can lead to more chopping.

We are trying to confirm this is in fact the case so we need your help. IF YOU HAVE AN ACCURATE CALIPERS, please measure the back end of your barrels ID. Please post the size here and please give us your best estimate on how many balls you chop per case. If you use an aftermarket bolt please state that too. Breaking down the barrel does not count, chops mean you get paint in your feed tube.

Thanks team we are counting on you!!

AGD

[-J�ker-]

well if this will help i have a boom stick and get bout 5 chops a half case= a day (dont have any clalipers)

[-J�ker-]

ok the inside measure of my barrel with a reg. ruler is 3/4 of an inch that help? im sorry if this dorsnt help i am just trying to help (thats a pun isnt it)

[X-Plosive]

Well mine is like .6879999999999999999999999999999999999999999999999 99999999999999999999999999999999999999999999999999 9999999999999999999999999999999999999999999... and so on but the manufacturer said it was .688. They lied. I chop about 1 ball every 3 cases and that only seems to be when shooting on my side. When i say my side I mean putting the gun at a 30 degree angle. I have no ball bobble what so ever wuth my bolt. AFter reading this thread I tested it and after each shot I do not see any ball bobble even after rapid fire. In all actuality I believe the only time people chop is when they don't have a parabolic powerfeed plug. It has solved the chopping problems on both of my guns. I also sent a parabolic p/f plug for free to an AO member who is called MightyMouse, it solved all of his chopping problems on his RT-Pro. For your information I use the AGD long nose bolts on both of my markers.

[AGD]

Thanks Xplosive thats the type of info we need.

Guys, if you don't have a calipers but there is a size engraved on the barrel we could use that.

AGD

[Flip540]

10" cp- .689

i chop only when i dont turn my revvy on or i turn my gun to far shooting out of the side of a bunker. i would say 2-4 out of a case.

[Miscue]

I don't think I've chopped a ball once on my Bigshot... several cases worth. Using extended nose bolt. I had problems with my Bigdaddy though.

Sorry, no calipers.

[X-Plosive]

Ohh by the way. I was talking about my boomstick in the previous post. My Bigshot is .688. I really prefer the bigshot it's nice and feels comfortable. My boomstick is 14"
and is good for balancing out a gun but its just to hard to find a good paint to barrel match for it. Anyway I really can't tell you which barrel I have less breaks in because there have been MANY variables and I have had the bigshot MUCH longer than the boomstick. Believe it or not the bore sizes on BigShots is inconcistent depending on which thread type it is.

[Magadeth]

Are you thinking that a larger bore= more blowback= more chopping? If so, in my experience this has not been the case. I have used the stock minimag barrel with no chops, a smartparts wich is smaller diameter (the paint, rps, fits tighter) with no chops, and an armson stealth (rifled with a larger bore) with no chops. This is all with a stock hr minimag. I think it must be related to trigger pull. I think paint quality may also have someting to do with it.

sorry if this is not what you are looking for, but I never chop. I do use ONLY rps marbelizers.

[Bad Dave]

Although it makes sense that a tight fit would increase blowback I think the overriding problem is that of the bolts design. As has been mentioned before to allow the bolt to cycle at very fast rates 20+bps blowback is the result, why not redesign the bolt so it has a maximum cyclical rate of 15bps or so?

Also paint quality is a really big probem I think. When the pros were using mags did they chop all the time? nope. Because they get the better quality paint through sponsorship or dealer contacts. Now newbies use mags the paint they feed them is of a much lower quality even if it is a quality brand it is the older paint or end of a run etc.

the two prestige tourneys i attended this year i had no probs with paint cos quality was high, i had 1 chop a case due to me outshooting my loader.

Ultimately poor paint will defeat any design of gun.

[Prezents]

Barrel i.d.

14"Dye al, .692
12"Dye ss, .689
14" J&J ss .689
12" J&J Cer ..689
12" J&J ss .688
10" J&J ss .688
8.5 Taso Nickel .690

I Cannot really give a accurate breaks per barrel, now that I have upgraded to the Retro Valve and a Warp feed.
Last game I shot the jj 12" and had no breaks out of a case of paint
Will let you know after this weekend, will use different barrels to test.
Prezents

[Restola]

i just measured my barrel and its about the diameter of my thumb.

glad i could help.

[Maxd Out]

Boomer - .688

RPS Advantage- only paint i will use now

I never chop! The only time I chop, I know it instantly because I shortstroked like a fiend. That only happens once in a blue moon. Of all the empty RPS cases sitting around my room, I cant remember the last time I chopped using that paint in my boomer.

[rabidchihauhau]

.689
10"
brass
'straight rifled'
no porting

approximately 1 break per 5,000 rounds (erring on the side of breakage - but then the 'mag is the reason I stopped carrying a squeege anyway...)

Steve

[Riot[Z-Grip]]

CP .689 12"

Fairly new condition, AGD Longnose bolt, mostly PMI advantage but some marbs and 32* stuff, breaks not from occaisonal short-stroking= 2-3 per 1,500.