I'd say considering your gear, you're doing pretty well !
A bottom pour pot or a real ladle would be a huge improvement.
I've only been casting for a few years so I'm not a great source of info on that. I have been reloading for many years and I agree that if the cartridge will chamber you'll be fine. My guess is you're not going to get those .362" bullets to chamber if that's an accurate measurement. I concur with Old Caster that the more uniform (consistent) your bullets are, the greater the accuracy potential. Given your .3575" throat diameter, I'd say sizing to .358 would work just fine. Also, you can abandon the water dropping.