FG, just my opinion here.
Concentrate on the calibers that you have for now. You can always stock up spares and trade goods after you're better set up.
Ammunition prices are set to rise in May, so it's prudent to be quick.
“If ye love wealth better than liberty, the tranquility of servitude better than the animating contest of freedom, go home from us in peace. We ask not your counsels or arms. Crouch down and lick the hands which feed you. May your chains set lightly upon you, and may posterity forget that ye were our countrymen.” ― Samuel Adams