First off hello everyone.

I'm a noob here.

I am wanting to load some lead gas check bullets for a 7.5 x 55 Swiss and a 30-40 Krag. Where is a good source for these bullets.

You can do a web search for "lead gas checked bullet". Here are a couple sites.
http://gardnerscache.com/lead_rifle_bullets.html
http://www.customcastbullets.com/
http://www.mtbaldybullets.com/

Best source is to make them yourself.

wow, that was helpfull.