Not how much you should reload. it's how much you have the capability to reload. You shoot 1K annually, do you have enough components on hand to replace the 1K shot? Do you have enough to replenish the 1K AND another 1K IF components are backordered? Do you have enough on hand to last 3 years, 4-5 etc. Having components on hand is like having enough food and fluids in stock Just In case.
I advocate having items on hand that if not needed could be bartered for items you do. Now if you find XX100 powder for a steal is it a good deal, if the only use for it is .475 H&H? NO, it's not. Score some H110 and you can barter it all day.

Right now and until furture notice hold on to what you have. $65 per 1K of primers, $125+ for 500 55gr fmj's I understand, just like guns, no one is forcing you to pay those prices. However if that is the norm now, what's down the road. ?