Like others said - don't do it.
For most of us - the only liability insurance we have - is the liability insurance we have on our homeowners or renters insurance / but it won't cover you when you're selling reloads .... Buying commercial insurance for "relaoding" will be expensive, if you can find an agent or a company that will even consider it ( I'd be shocked if you could get a policy with a $1 Million liability limit for less than $ 25,000 a year - and I would expect it to have a deductible for at least $ 2,500 or maybe $ 5,000 ). And if someone dies / or loses eyesight, etc - $ 1Million might not be enough insurance to protect your personal assests from being in-play..... ( and the cost of defending the lawsuit, might be "inside" the limit / so it costs $ 250,000 just to settle - you only have $ 750,000 left to pay a claim ...
Having your friends sign a waiver - just proves you know its dangerous / and if someone gets hurt badly ...it won't be worth the paper its printed on probably. Is it better than nothing - maybe / maybe its making it worse...
The business issue of this aside / licenses required, etc .... think how bad you're going to feel if someone gets hurt / whether it was your fault or not. Even from a practical standpoint - if you did screw up - they blow up a
$ 3,000 handgun / can you afford to just buy them another one ...vs deal with a deductible ....and how many claims do you think they'll tolerate before they raise your rates "big time" / or outright refuse to renew the policy for the next year ......
And you want to take on all this risk ....make up a business plan. If you could make $5,000 a month gross profit (if you charge $ 4 a box profit over your components, you'd need to load 1,250 boxes of ammo a month ) .... depending on type of press you have 1,250 boxes is 62,500 rounds so how long will it take you to load 62,500 rounds ... at 500 rounds an hour that's 125 hours a month .... and with insurance, taxes, etc for overhead it'll cost you about $3K a month at least in overhead - so the net profit might be
$2,000 a month.
First of all - where are you going to find 125 man-hours a month / that's an extra 31 hours a week ? Do you want to work 16 hrs a day on Sat and Sunday every weekend .... Can you really sell a box for $ 4 more than what you pay for components ... What's the plan / if your market dries up - or some moron says he'll load for your customers at $ 3 a box and undercuts you - because he has no insurance and doesn't care ......
Its a bad plan .....