looking for some range SRC M4

[Skladfin]

Originally Posted by grantmac

IMHO, a tightbore has the worst cost/benefit ratio of any upgrade.

Its just not going to net you that much extra speed or power.
Really you should look at a spring that runs 360-380 fps. Then get a stock TM barrel (loose bore as possible) in a short length to swap in for CQB (ideally with a spare hop-up). The cylinder porting used for the longer outdoor barrel will be wrong for the short one and you will probably loose just enough speed to be under the CQB limit. I've tried this before and it let me run one gun in two different "modes" without having to open the mechbox all the time.

-Grant

+1 to this man. He said everything I wanted to say in this post and the first post.

[kalnaren]

Originally Posted by grantmac

IMHO, a tightbore has the worst cost/benefit ratio of any upgrade.

Its just not going to net you that much extra speed or power.
Really you should look at a spring that runs 360-380 fps. Then get a stock TM barrel (loose bore as possible) in a short length to swap in for CQB (ideally with a spare hop-up). The cylinder porting used for the longer outdoor barrel will be wrong for the short one and you will probably loose just enough speed to be under the CQB limit. I've tried this before and it let me run one gun in two different "modes" without having to open the mechbox all the time.

-Grant

Seriously? A tightbore is going to do more for your gun performance wise than a harder spring. A tightbore will decrease your grouping size. Higher FPS will just get the BB to it's target faster.

[Styrak]

Originally Posted by kalnaren

Higher FPS will just get the BB to it's target faster.

And increase range, which is what the OP wanted.

[ThunderCactus]

You can still get fantastic range on .25s, but it requires proper knowledge of compression.
However maximum effective range requires an experienced gunsmith to clean your mechbox, grease it properly and get the maximum compression possible out of it.
But the easy way is, as was stated, hop rubber, barrel cleaning, tightbore.