Ammo control is more effective form of gun control. Firearm w/o ammo just makes unique paperweight.
I disagree. Ammo is not serialized, is ubiquitous, and can be produced (reloaded) at home. It would be impossible to enforce an ammo ban.
What do you think is happening in California by the State requiring all ammunition sales must be through a FFL dealer?
Their strategy is simple and if it continues will be very effective in stopping ammunition from being sold in the State. Now that ammunition can only be legally purchased through a FFL dealer the next step is to simply reduce the number of FFL dealers in the State.
One of the easy steps the State can take is to inspect the physical business location of the dealer to make sure they are in compliance with all zoning and other laws. The businesses that are not are reported to the BATFE to have their FFL revoked.
The second easy step is to amend / pass stricter laws that require the FFL dealer to comply with. Building codes such as requiring bars on all doors and windows, 24 / 7 camera surveillance, 24 / 7 alarm monitoring, safe storage requirement of firearms when the business is closed (such as safe or gun vault), requiring ammunition be kept behind the counter where the public can not reach it.
Inspections by the Fire Department are another easy step. These steps will be targeted towards putting "kitchen table" dealers and dealers who have been in the same building for many years and the cost of improving certain things such as the wiring, amount of storage space in the back room, etc. is too much to justify staying in business.
Of course taxes on guns and ammunition will need to be raised to pay for the additional staff to conduct these inspections.
Since you think reloading will make a ammo ban impossible it isn't. First ban sale of all reloading equipment, powder, primers, bullets, etc. Second ban Internet sales of same items. These two steps will cause reputable out-of-state businesses to quit selling and sending those items to that State. People / businesses that break the law by selling and shipping these items will be running the risk of arrest by Federal Law Enforcement. Since it is no longer possible to by reloading supplies folks that reload will be faced with the reality that when they run out of powder, primers and bullets they can no longer shoot.
It will take a few years to accomplish these goals but reaching the long term objective is possible.