Barrel sizers or kit

[vDubLeics]

hi, i have a A5 with a lapco bigshot barrel and i was looking at sizers to help with accuracy and velocity.

if i use .68cal paint what sizes am i most likely to come across, the options i have are
.679*
.682*
.686*
.688
.690
.693

i want to check as they are £15 each and i an looking at getting at least 3 of them... i have put a * next to the ones i am thinking of

OR

am i best to het a hammerhead barrel kit and if so whats best for woodsball with high accuracy
Thanks

 

[Tom]

Barrel sizing is an endless world of obsession.

Before spending decide if it is worth it to you - you either have a precise match, over bore or under bore. People will swear by all 3 as the best option

And if you don't have the best - what is the impact it will have on you?
Bad matches in one way / bad paint can mean barrel breaks, or in another way can mean inefficient air consumption, or inaccuracy

Regarding accuracy we use gelatine balls filled with liquid - we are not realy going to get true accuracy and consistency, we can improve on those, but with practice, tuning and spending money

Options are to forget it, collect various barrels of different materials/lengths/bores/one piece/two piece etc, or go into size matching

If you go for bore matching then you either buy for every size available - and use a small number of them, or buy specific sizes and risk not having the right one. EG buy up to .683 but get balls at .690 then you can underbore, but are kicking yourself for spending on the wrong range

Go for higher sizes and you can overbore but are the kicking yourself when you get small balls

Go for a wider range such as .679, .686, .690 and you have a wide range but are close to any size ball
But if you buy brands that are consistently small or large then it may pay to get better matches by buying the 3 smallest or largest

If things to wrong then having too small a bore and tight balls will give you the worst experience with breaks, if you have too large a bore then you just loose air pressure and efficiency


Sorry - but no specific answer on sizes

 

[Magic Rat]

If it helps I have 689,685,681 and I use 685 most of the time,this back suits most paint.
Evil,GI sport 3*&5* and site cheap stuff.
Occasionally I use 689,on hot sweaty days.

 

[vDubLeics]

thanks for the advice, i probably should give you me info on why i'm looking into it. i have wild velocity readings on my A5 e.g. 1st=260 2nd=295 3rd=275, i have checked everything and cant work it out. so after talking to a chap at CPPS and he shown me barrel inserts, i would like to try them
also the A5 is really hungry on gas (i have been told they would be with the feed system and response trigger) so i hope this may make my gun a little more efficient

 

[Tom]

thanks for the advice, i probably should give you me info on why i'm looking into it. i have wild velocity readings on my A5 e.g. 1st=260 2nd=295 3rd=275, i have checked everything and cant work it out. so after talking to a chap at CPPS and he shown me barrel inserts, i would like to try them
also the A5 is really hungry on gas (i have been told they would be with the feed system and response trigger) so i hope this may make my gun a little more efficient

Bore matching will help with consistency & consistency. This is on the assumption that you are pouring air out past the ball down the barrel.

With the cyclone and response trigger operated by air people do say that they will use more air, others say it doesn't as it uses exhaust air.
Either way the A5 is not the most efficient, it's a blowback and operates at the full output pressure of the cylinders regulator - initially designed at 850psi in line with co2 output, but generally outputting at around 650psi output pressure these days.
More 'modern' guns have low pressure internals, using the guns own regulator to drop the pressure in the region of 200psi and unlike blowbacks don't channel the air through the body of the gun (mostly) but via internal hoses, using both lower pressure and less capacity to operate the process of firing a ball.

It is possible to improve efficiency, consistency is the best start.