I appreciate the fact that so many of you are expert marksmen.  I have been shooting .22s for a long time at normal match ranges and I've done the military thing with limited m-16 experience. But as far as long distance shooting, it is new to me.
So here is the deal.  I shoot a .243 and a 30-06.  I sight them both in at 100 yds. The range i have access to is up to 100 yds, no further and I wouldnt know where to find a longer range in CT.  All the deer i have taken have been taken at under 50 yds.  I have read about sighting in at longer ranges to increase the distance as the bullet will drop off quickly when sighted at 100 yds. 

So my 30-06 vanguard shoots great groups dead on center at 100 yds with factory Federal rounds or my handloaded Nosler ballistic tips (which i'm super happy with).  My .243 shoots my handloads dead center.... except for 100 gr rounds (i load 62, 75, and 85 gr rounds, different brands.  My 100gr are nosler partitions and hornady soft point.) My 100 gr rounds shoot high consistently. The Hornady about 1.5in, and the partitions 2.5-3 in high. 

My question is, where do I find info on the bullet paths of different rounds at different ranges?  If I'm 2 in high at 100 yds, where am I at 25, 50 or 75. If I'm dead on at 100 yards, same thing.  What if i get an opportunity for a longer shot?  How do you guys keep track of bullet drop or compensate for distance?  What if I hunt coyotes with varmint rounds and Deer with partitions the same season with the same gun, different groupings?

I am a successful hunter, but my shots arent always spot on where I thought they would be.  My wife is a math teacher and would happily spend hours talking about parabolas, but I'd rather not.  As an under 100yd hunter I'm happy, but I plan to expand my horizons in the future and wouldn't want to embarrass myself or wound an animal. 

Another kinda dumb question from a newbie.

Okay, what is the trick?  I never thought it would make that big a difference.  I got a Vanguard SS Sporter... my first rifle... in 30-06.   I got a "normal" caliber because I dont load my own (yet).  I picked up Remington Core lokt rounds in 150, 165 and 180 grain rounds.   They do OK.  Federal power shock rounds give me AWESOME groups.  I was looking for some good big game rounds.  I picked up some Winchester super X silver tip rounds... I figured in 180 grain they'd have some good take down power.  I was shooting 2in groups with the federal rounds (with my flinching) and was happy with my groups. The remington rounds did OK.. decent groups that i can get better with practice.  The win. silvertips barely hit the paper.  What gives?!??! I figured on some difference, but these are terrible!! Are rifles that picky? 
Second part of the question, when you load your own do you have the same problems? Do you need to experiment as much to find "the perfect round?"  What is the best reloading equimpent for a beginner and where does one start for bullets, powder, etc. Where is the best place to pick up reloading supplies... cabelas?  Ebay?

You guys are the pros!! Thanks a bunch.