i got a glock model 22 which is a .40 cal.,, im looking at a glock model 21 its a .45 cal my 22 hold 15 shots while the 21 hold 13 shots. should i sell my #22 for the #21 ? or m a crazy. the 40 will shoot farther,and more accutrate from a far. but the 45cal has knock down power right more than the 40 cal..the 45 acp bullet appears to be big!!! tell me what i should do? i got 800 rounds of 40 cal bullets and 5x15 round clips and 2x10 round clips .how much should this gun bring? real good condition compared to new guns i seen at the gun /knife show i seen my gun used ragged out for 450 it the show.i didnt bring mine and to see what they would give me? need advice thanks.