For info, QUARTERBORE forum is BACK, after many months of "closed".
I can't tell you much about the 20mm vulcan round other than that I know it exists and there are some rifles out there (in the US anyway) chambered for that round. I've seen a Lahti anti-tank rifle converted to that cal as well. I owned a Lahti for some time in the original 20mm X 138 B caliber and I currently own a Solothurn S18-1000 anti-tank rifle in that cal. I do load for the Solothurn and shoot it. It is quite pleasant to shoot and very accurate as well. What else could be expected for a rifle from City/Canton Solothurn???
I don't know if I can help you at all but I'll try.
Good day Frank
I saw that you are shooting 20 mm's. I'm planning the build of a 20 mm Vulcan Magfed rifle and like to ask if you know other shooters which are familiar with this caliber. I have still a lot of questions which no one here can answer me (Switzerland), because everyone think's that a 458 Winmag is allready the biggest caliber ever.
I well appreciate every help.
I hope you'll find the time for an answer.
Greetings from Switzerland