It may be Winter, but Spring is coming. So start planning for your first airgun outing.
Started by rsterne, August 28, 2018, 04:34:17 PM
Quote from: rsterne on November 26, 2018, 04:33:11 PMIf I scaled up the .30 cal Hunter to 0.575 cal, it would be 320-360 gr. and be 0.69" long.... Either one should work just fine, it's a matter of drawing up the one you guys want.... I also need to know the head and skirt diameter you want.... The head diameter should be close to, but NOT over, the groove diameter of the barrels.... but MUST be larger than the land diameter.... The skirt diameter would normally be about 0.012" larger than the head, to keep the proportions used in JSB (and NOE) pellets of other calibers.... Part of the large difference between head and skirt diameters is to make the pellet forgiving, so that they are tolerant of barrel dimension variations between manufacturers.... If there is only ONE set of barrel dimensions, the skirt and head can be closer to the same dimensions.... It is usual for the skirt to collapse slightly when loaded into the chamber....Bob
Quote from: tkerrigan on November 27, 2018, 01:25:02 PMI went out and measured the DAQ .575 barrel on my pistol. I used an old (before cheap) Mitutoyo dial caliper that is accurate. The bore was right at .575 several times, the lands were .569 using two precision pins that fit when together, a .284 and a .285. Remember I want one. Regards, Tom