Sorry Trevj
I am looking for 9mm, 40S&W, 45ACP, .223, .22-250, .270, and 308
in FMJ, RN, HP and SPJ all in large quantities
I am guessing that you are not looking at getting 35K of each bullet, rather, an order of a variety of different common bullets, totalling 35K+?
You're probably (just barely) at the level where it makes sense to talk to the bullet makers directly. 35K bullets at 30-ish cents each is ~$10K.
A $10K order might be big enough to pay for the various costs, e.g. export paperwork from the US ($200? $500?), shipping a ~1000lb pallet of bullets ($500 to a US address? $1500 to a Canaidian address?), etc. You'd pretty much have to buy all your bullets from one manufacturer, otherwise you'd have two smaller orders and the overhead costs of an order would really hurt.
I would suggest you consider importing the bullets yourself, since you're reasonably near the US border. You'd have to arrange a US shipping address. Apply to CCRA for an "importer account", it's a simple sub-account ("RM0001") addition to your business number (income tax, GST/HST etc). Self-brokering an importation of your own into Canada is pretty straightforward, and can easily pay for the savings in paid-brokerage costs and vastly increased shipping charges for cross-border shipments.
Business-wise, be sure to choose ammo to produce that you have some sort of advantage at. Plinker-grade .223 is probably what you *don't* want to be making. Choose your markets where you'll be able to do well in, don't feel obliged to spread yourself thinly.