arrow accuracy.....HELP
 

at the location where i shoot there is consistantly a breeze moving from left to right. the question that i have is does the wind have an effect (1-2 inch) on arrow accuracy at 20-30 yards?

It depends on how fast the wind is. I was shooting the other day and there was about a 10mph breeze movine right to left. I noticed it threw my shot off a couple inches at 40yrds. But 20 & 30yrds I didn't notice much difference. But the answer is yes, it can definately affect your POI.

Are you shooting a 350 gr. arrow with 2" vanes 300+ fps or a 600+ gr arrow with 5" feathers 200 fps?

Best way to know is to shoot and check the results. Shouldn't hurt though, as long as your shot is aimed correctly in the first place.

Yes, it will effect your point of impact. The wind may blow the arrow over a bit and most likely it will make you move during the shot. Exactly how much will vary with the conditions and your bow and arrow setup.