It would clearly lose in this comparison. The 7-30 is an improved case on the full length .30-30 case. The .30 Herrett is a much shortened version of the .30-30 case so no matter how you improved it there would still be a significant edge in favor of the 7-30. Because of the pressures the cases can operate at safely the 7 TCU should easily out perform a 7 mm on the Herrett case.WildcatTC said::gun4: what would a 30 Herrett be like if you necked it down to a 7mm.How would it compare to the 7 X 30 Waters? Hmmmm
Hey Jimmy, this thread is 18 years old.....If you're set on barrel length of 14" go with the 7-30 Waters for performance.
If there is a consideration of convenience, the 30 Herrett was designed to effectively utilize the limitations of 10" barrels, in a 14" you'd be well served sticking to it's parent, the 30-30 Win and finding it it prevalent and affordable.
How did you get it to fit in the mag? Assuming you seat the bullets deeper?For a rifle or carbine, I still see the 7 TCU as nice round. As a matter of fact, when the range re-opens (run by the parks department and shut down for C-19) I will resume working on load development on my 16" AR-15 in 7 TCU.