Nail size?

[isawlogs]

 A long time ago     I help a neighbour , who later became a good friend , build a hunting camp .
  He had two types of nails ....  big twistys  and small twistys     the big ones where 4" galvinized spirrals  , small ones where 2 1/2" galvinised spirrals . that is the summer I had Popeys arm . 

[Don P]

Not gun nails but these are the popeye nails I like with the palm nailer. They maintain their strength the best of any when using wood green that then dries.
http://www.mazenails.com/catalog/catalog.php?page=PAGE23&group=POS
http://www.mazenails.com/catalog/catalog.php?page=PAGE23&group=POS2
The instructors in a class were pushing the ring shanks over spirals, they have slightly higher initial withdrawal numbers. When I quizzed a little further, the spirals have a slightly lower initial "pop" but a slightly higher withdrawal from there out. I like spirals myself and maintained that the roofers usually take care of the pop anywhere in the building when they stock the roof 

[IMERC]

the Hitachie guns get excellent reviews... look into the 83 model...
16d shorts or fulls will be plenty for what yur doing..

[TexasTimbers]

I have an old Paslode that I like, a old senco, and a REAL old unibody paslode that is too cool. You can tie a rope to it and use as a demolition ball - then after demolishing the building you can cram it full of nails and build something with it. It is LOUD, has a monster recoil, and blows air right into your face

But time and time again as IMERC points out, I find myself reaching for one of my Hitachi's. I don't like that new color scheme though. I wish they had stuck to their light metallic green. All my hitachi's have the old paint scheme. Function over form I know but I just don't like it that they feel like they had to follow Makita's radical youth-getter makeover.

[Don P]

and blows air right into your face

I hate having to unwrap eyelashes from the back side of my eyeball 

[scsmith42]

I've got a Porter Cable FR350Mag.  It will shoot a 3.5" nail, as I recall up to .160 diameter or thereabouts.

The nice thing about it is that it's made from magneseum, and it's a bit lighter than the normal air nailer.  It shoots a full round head nail, for maximum pullout resistance.

You won't have to reload as often if you buy a clipped head nailer though.

The company in the link that Don provided (Maze nails) has some really great products.  I used their 3.5" spiral shank double galvanized nails when I built my perimeter fence - no problem sinking them into very dry locust fence posts.

[IMERC]

You won't have to reload as often if you buy a clipped head nailer though.

local codes now say which nail to use... CH or FRH's...
gotta watch it...

an old Senco SN-IV with the over sized mag will shoot 4" nails...

Paslode offers an offset FR collated nail that works in a lot of CH guns.. several dia's...