Accuracy is in the eye of the beholder...some think anything larger than bullet diameter is unacceptable, others think 2 rounds in a pie plate at 50 yards is fancy enough...you have to decide your level and work towards it.
You didn't say what kind of rifle/pistol the Waters is so that limits the information also. Tell us what kind and someone should have information reguarding their experiences.
Most 7mm cal bullets no matter what brand will work for "normal" hunting accuracy...1 1/2" or less. I have a partial box of the old Nosler SB 140's and horde them like gold. They were accurate in every 7mm I've ever had and that includes almost all the standards and a couple of wildcats. If I had 5 boxes of those gems I would work up a good hunting load and use the rest only in putting meat on the table...one shot each only!!!!!
If your new to this game or even an expert, here are a few very good sites for information on how to accurize your ammo and shooter or general information and a search online will give you lots of other forums to pick from. Saubier, 6mmbr and Precision rifle are more deeply involved with target and small caliber stuff.
http://www.6mmbr.com/index.htmlhttp://www.freewebs.com/precisionrifle/accuracyarticles.htm.
http://www.beartoothbullets.com/index.htmhttp://www.marlinowners.com/board/http://www.saubier.com/forum/forumdisplay.php?s=15b75416fa12aa4097d3b87d029f99bc&f=2GrayBeard has a very enlightened group of experts on just about any subject having to do with reloading so if you want specific information do a search or just ask.
For my participation I suggest first to accurize your shooter, then accurize your ammo. Trim, uniform the primer pockets and deburr the flash holes. It only takes a bit of time and only need be done once except for the trimming which I do for every caliber after every firing. Then weigh sort and put the high and low weight brass aside. For your application plus/minus 1 1/2 grain would be sufficient. doing this will get you started down the straight and narrow and solve many of those "flier" problems that crop up. An accurate rifle and accurate ammo is the basis for accurate loads.
I have two 7mm-08's, a 15" XP100 and a 22" switch barrel Ruger. Both shoot the Hornady VMax 120 gr bullet into much less than 3/4" using the exact same load interchangably which doesn't happen very often. It is a varmint bullet and will work in your 7-30 AI as such also. The bullet is seated out to touch the lands in both guns. It might work well at your lower velocities as a deer/antelope also but that is something you would have to try, it might expand well or it might expand to much to penetrat well...I wouldn't shoot a deer with either of my 7-08's with that bullet, I would go up to any of the cup and core lead tipped style bullets, but the 120 Vmax at 300 fs plus faster than the 7-30 AI makes squirrels disappear in a purlpe haze.
All the 7mm and larger cals I've worked with seem to shoot better with the bullet seated from 0.005" away, touching the lands, to about 0.010" into the lands, but doing so means you need to start at the LOW end of the pressure range and work up SLOWLY IN 1/2 gr increments for your CC size case.
I don't have any information on the CC of the 7-30 AI so you should weigh a few fired cases, take the average, then fill one with water,weigh again and subtract the empty weight from the full weight. That will give you the CC of your cartridge. I would hazard a guess at around 48-52 gr. You might do the same thing with an unfire formed sized case so you have a comparison to work with.
It takes a bit of work to extract the highest accuracy from your rifle and ammo. To some it isn't worth the bother, to others it is the holy grail...you have to decide your comfort zone and level of effort. In any case you have an excellent base in your 7-30 AI to work from .
Have fun with your new toy and good luck.
'Njoy
