The ONLY way ammunition production of ANY kind will ramp up any further is if the demographics show that the current demands are, in fact, establishing a new "normal" level of demand.
Ammunition manufacturers, like any other company which produces some tangible good(s), have their production lines set up to meet the market demand, with some excess designed into this in order to accomodate market fluctuations as well as maintenance and repairs.
When the market demand spikes, production goes up as far as the maximum design capacity of their full production facilities. If market demand still outstrips production, then the result is a shortage of product availability.
However, companies do NOT rush right out and start building new production lines because there are a lot of problems with doing so, both in the short term and the long term.
In the short term, even if they have the facilities in which to physically expand into, they have to design the new production lines, build them, hire and train new personel to operate and maintain them, and fund the increase in raw supplies to build the product.
This takes time and money to do. For short term market spikes, they'll end up spending tons of money for equipment that will no longer be required by the time it's ready to go into production.
In the long term, excess production facilities lie fallow when the market demand drops back to normal levels. People get laid off and the company still has to maintain the unused equipment if they don't want it to suffer through neglect/unuse, and the new facilities still have insurance and lease payments to make good on.
So ammunition companies aren't going to "ramp up" their production any more than they already have simply because they're likely already at maximum. It's just not physically possible for them to produce more.
When this current spike in the market is over, the companies evaluate the history and the new market levels of ammunition salews in order to make wise, long-term decision with respect to their production capabilities.