The 147 and 124 grain are bullet weights. The 124 grain bullet loaded to higher pressures (+P) will have a higher velocity than the standard load with a heavier 147 bullet. As far as penetration goes, I have seen tests where the 147 grain out performed the 115 grain +P but the 124 grain +P should be a good all around round.
standard 115 grain 9 mm ammo or higher grain bullet.
You may use any 9mm Parabellum (9mm Luger) cartridge that is standard or +P, including 124 grain ammo. Recoil may be higher than with 115 grain ammo. Do NOT use a +P+ cartridge.
115 grains is the weight of the bullet.
Not sure where you got your information from. Define inaccurate. I've shot 45ACP 230 grain ammo out of a WWII M1911A1 that would put them all in the chest of an E series target at 25 yards. All weapons will exhibit a preference for one or more types of ammo/loads. You have to experiment.
If you mean +P ammo the answer is no. It is rated for standard pressure ammo only.
The pda allows you to buy ammo anywhere in the game. The ammo will cost extra for this benefit.
Possibly the Winchester 110 grain Silvertip. The 125 grain Silvertip is a +P load, the 110 is not.
30/06, 150 grain
230 grain round nosed FMJ.
Any standard .380 ACP ammo, yes.
Whether for pistol or rifle, .22 Winchester Magnum Rimfire ammo is loaded with bullets ranging from 30 to 50 grains. The standard seems to be 45 grains.
It fires the 5.56x45mm cartridge. It is compatible with the 62 grain M855/SS109 ball, the 64 grain M856 tracer, blank cartridges, and it can use the 77 grain Mk. 262 cartridge. The slow twist of rifling (1 in 7) makes it impractical for use with the older 55 grain M193 ball ammo and 45 - 55 grain commercial .223 Remington loads.