WD-40 will ruin a gun ?

My uncle has used it for years without any problems, but I have also seen people bring in guns that have a lot of bluing removed and blamed the penetrating oil.

I would NEVER use WD-40 on ANY of my firearms.

I learned the hard way that WD40 will gum up the actions of semi auto guns.

Yea, blow off using WD-40 on guns. There are a lot better solvents on the market today. My dad swore by Rusty Duck, but I never used that stuff either. I use Gun Scrubber for very dirty actions, but I don't like the way it dries and kind of leaves a white film. My old standby for shotguns, and I used to shoot a lot of competition trap, is Hoppes #9 for cleaning, and Rem Oil for lubrication. Plus if you dribble a little bit of Hoppes on yourself it gives you that man smell that women can't resist and let's other men know that you're a real man!!!!!!!!!!!! LOL!!!!!!! Way better than that Axe stuff the kids are wearing today! For rifle barrels I use Montana Extreme and Shooter's Choice. Ammonia based solvents seem to work the best. For blackpowder guns I use Mercury Outboard Engine Cleaner for carbon and fowling. I hate the hot soapy water routine of our forefathers after using Goex. On my long-rifles and fowler TVM recommends using transmission oil on the barrel and lock surfaces to preserve the brown-blued finish. On a side note: the absolute best penetrating lubricant to use on engine parts, old rusted nuts and bolts, anything that is going to be a pain to take apart use PB Blaster available from NAPA! After working for 20 years on 60 year old rusted junk in the power industry, PB is the greatest thing I've ever seen! An old mechanic at work used to say, Son spray it with Blaster, leave it over night, and it will have disassembled itself in the morning!!!!!!! Also, always use Neverseeze antiseaze lubricant when putting bolts and fasteners together. It makes things a whole lot easier to take apart the next time. I even use it on wheel studs to make the lug nuts easier to get off. People say it will change the torque value of the stud, BS!!!!!!! It won't hurt a thing. What has damaged more studs than anything on vehicles are the jack-pines at Walmart and Tirebarn over torquing them in the first place with air hammers and impact wrenches.

Old3's words of wisdom for the day!

From the WD-40 Website...

What about using WD-40 on my sports equipment?

WD-40 is safe and effective to use on all types of sporting goods. Use WD-40 on your bike to clean, degrease and lubricate your chain, derailleur, gears, cogs, and moving parts. It will help remove stickers. Use WD-40 to clean and protect your gun. It will prevent corrosion and it won't damage bluing. Spray it on dirt bikes to protect parts and prevent mud from sticking. Use it on watercraft to protect metal surfaces from corrosion and to drive out moisture. WD-40 is also great for cleaning golf clubs and preventing rust on hockey skate blades.

I think Hoppe's No. 9 has a stronger smell than WD-40!

Ladies and gentlemen, attention please
Come in close so everyone can see
I got a tale to tell
A listen don't cost a dime
And if you believe that we're gonna get along just fine

Now I've been travelin' all around
I heard trouble's come to your town
Well I've got a little somethin'
Guaranteed to ease your mind
It's call Snake Oil y'all
It's been around for a long, long time

;D

So, in reviewing the posts above, it looks like nobody has ever ruined a bore by using WD-40 in it (even leaving it in for an extended period). Further, it seems that nobody has ever witnessed such a tragedy befall the bore of a friend's guns.

Right?

Might as well use 3-in-1 oil too. ;D