Sorry, I can't be of help. That was my first silver with the Vaquero and last week I dug a mercury and that was not too deep I have yet to find a deep silver 7-10" range with any detector Land hunting.
I have been trying to clean a lot of trash out of this park to see if I can hit something deep but just hasn't happened. My problem is I have I have to many detectors and I water hunt in the summer so
I have not learned one land detector well. Plus I have hearing loss, the coins have to be there and I you have to get the coil over the target.If I ever get silver over 6" range I will let you know.
I noticed you also swing a Minelab which is know for deep silver. I also have an SE and have not found deep silver with it. On a side note my Vaquero has already paid for it self with 3 gold finds and some silver but I dig a lot more trash.
HH, Epi