Mossy 500 questions

[c-bag]

friend of mine has a Mossberg 500 security model 20" bbl full length tube.

-when i look at the website it says this gun holds 8 rounds but when he loads it he can only get seven 2-3/4 winchester game loads in it with number 8 almost making it but not quite.

do they mean 7+1=8 or just eight?

-secondly we/he haven't been able to get the mag tube off despite repeated soakings w/penetrating oil (yes we kept the ammo away from the oil) he bought the gun used and the seller hadn't "had it out" for about five years previous. are there any techniques besides torque and lube we should use here?

any suggestions on either point would be greatly appreciated thanks

 

[rayra]

7+1.
And penetrating oil is all you should need give it time.
With the barrel off and with no visible corrosion or thread-locker on the mag tube threads, it really should take nothing more than a firm hand grip.
If you find yourself reaching for steel tools - STOP, and let it soak another day.

 

[Kevlarman]

I had a hard time taking the mag tube off my 500 the first time I tried it. Here's a suggestion: sit on the floor with the gun in front of you. Place your feet on the receiver and use your hands to twist the mag tube off. I find that using one of those rubber "jar openers" really helps.

Oh yes, make sure it's unloaded before you try it!

 

[Andrew Wyatt]

use a strap wrench on the mag tube.