So I use this tut for my buyable max ammo, it works well: http://modsonline.com/Forums-top-102627.html?start=
But the problem is, it seems like it only lets me buy ammo when my weapon amount gets to a certain point.

For example, Say I have an MP40. 32 in clip plus 160 reserved (192 reserved at max ammo) It won't let me buy ammo for it until say I get down to like 100 reserved ammo.

 I figure this is an easy fix, I just don't know how to go about doing it, thanks in advance!

                weapon = who GetCurrentWeapon();
		ammocount = who getammocount(weapon);
		clipcount = who getweaponammoclip(weapon);
		maxammo = weaponmaxammo(weapon);

		if( !is_player_valid( who ) || maxammo <= ammocount + clipcount) continue;
   
		give = 0;

                if( give > 0 )
		{
			who givemaxammo( who GetCurrentWeapon() );
			who maps\_zombiemode_score::minus_to_player_score( self.zombie_cost );
			who playsound( "cha_ching" );
		}      
		else
		{
			who playsound( "no_cha_ching" );
		}

If it is playing the no cha ching sound when you try to buy it is is because of these lines:

                weapon = who GetCurrentWeapon();
		ammocount = who getammocount(weapon);
		clipcount = who getweaponammoclip(weapon);
		maxammo = weaponmaxammo(weapon);

		if( !is_player_valid( who ) || maxammo <= ammocount + clipcount) continue;
   
		give = 0;

Later it checks if give is > 0 here:

                if( give > 0 )
		{
			who givemaxammo( who GetCurrentWeapon() );
			who maps\_zombiemode_score::minus_to_player_score( self.zombie_cost );
			who playsound( "cha_ching" );
		}      
		else
		{
			who playsound( "no_cha_ching" );
		}

k, with no sounds it is saying that this is true:

if( !is_player_valid( who ) || maxammo <= ammocount + clipcount)

Add above this line this:

iprintlnbold(ammocount," ammo ",clipcount, " clip ", maxammo," max ammo ");

Then do that math and see if that is the issue.

Sorry about last post, I re read and saw i was wrong and changed it.