Just wanted to take a minute to thank you guys that gave me info and advice on volume verses weighing.
Went out and shot my new omega with 80 grains by volume this time and had much more consistant groups. the 348 gr aerotip powerbelt seems to like this charge. I will be doing as suggested next. thowing 10 charges by volume and weighing each and taking the average, trying for a more consistant charge each time. your advise has been well taken and appreciated.