Hi, I am new to this forum and just wondering if anyone has experience or info about either of theses cartridges. I am planning a new barrel for my contender and I THINK MAYBE (always open to new ideas) I have narrowed the choice to 25x30/30 AI or 6mmx30/30 AI. I target shoot more than I hunt but, am also thinking of a good caliber to start my 10 year old grandson on paper and then whitetail. Any input or info would be greatly appreciated. Thanks in advance for any help.
Safe shooting
Doug