Granted, you may have a point there FH. :wink:

:lol: Back when I was giving Alpha 7 I wasn't feeding as much mineral as I do now.
At branding time my neighbor who also used Alpha 7 attributed the knots/lumps to bad injection technique, until we branded his calves the next week and found knots and lumps on his calves too! :roll: :lol:
I seem to get the same good results as Alpha 7 with Vision 7 and without any knots or lumps. OK, mineral could be some of the difference!
I have always used the disposable 3 ml syringes and 10 ds vaccine bottles in the field. Alpha 7 is really rough on the plungers in the vaccine guns and causes them to swell. I'd replace the gun with a new one with every bottle of vaccine.
No problems at all with the Vision 7. I probably shouldn't but I might only use a couple syringes for the whole herd for the season.
I wash the syringes out with plain water after use and allow to air dry disassembled. When I used Alpha 7, I would lube the plunger with mineral or vegetable oil before sticking it back together.