Hi, this is my first post and I should say nice job on the low cost 510 Whisper alternative. I was referred here from different site because I am doing something similar. My round is very similar but based on different brass that also is 50 cents each instead of the 4 dollars people pay for the 510 Whisper brass. I will be using either the 50 Beowulf or a shortened 7mm WSM brass casing. Years ago I a had a reamer ground for .50 AE blown out to a straight .540 which allowed seating .510 bullets in BMG barrels with it. The reamer is long enough to do the same thing with the Beowulf round. However I am slightly worried about the highly rebated rim and set back of the web at high pressure so I have also been considering using 7mm WSM brass cut off at the shoulder because it has a stronger case head. The problem with the WSM brass is the web is .555 and needs to sized down to .540 to feed and extract easily.
Below are a few pictures of the rounds I am considering and of an aluminum barrel mock up for the Arisaka so that I could see how the Beowulf rounds feed and fit in the chamber. Since the entire web is inside the chamber I think I will go ahead chamber my 1 in 9 twist Pacnor barrel for the Beowulf round and see how it works.
Jeff
Hybrid Mode
