Paper Patching 308 for the 303 Brit
After looking at this for a long time now, I have chosen the bullet to patch up for the Brit - 110gr 308 varmint flat lead hollow nose. I chose this bullet because it has that wide flat hollow nose that I am hoping will work at low velocity. My idea being to shoot them in my semi-suppressed sporter No4 using Trail Boss. This bullet has about the same if not longer shank length as does the 125gr spitzer varmint bullet. So, for quietness, the 110gr should give me higher velocity and more impact effect out to perhaps 100yds or meters.
I did a test on a cut back 150gr bullet (134gr) with TB and measured the sound level inside my workshop. 117dBA. That's quiet for outdoors. I'm going to be taking a young fella out hunting and want to be able to do target shooting with him before getting into the serious hunt so that sound level outdoors is not going to disturb the whole countryside.
The bullets are on order so in a few days time I will start developing a load which will be something like 14gr TB under those 110gr bullets or maybe 15gr for more velocity. The idea is to patch them to just fit an unsized case neck. The rifle is a two-groove with a bore of .305". The patch only needs to deliver the bullet concentrically into the bore. I'm trusting that the patch itself will get obliterated in the throat. Velocity is expected to be a mild 1500 fps.