Since the conversion to EPPS I also started reloading new cases from Hornady. Before the conversion I only used old factory PMP ammunition in my rifle without any problem. I have recently converted my No4 Mk1 to an EPPS. There is no way that these statistics would be taken as 'accurate' for QC purposes but I believe they show enough guidelines for us to be very careful when we are buying a 'new' bolt head. Note : I use the term "NUMBER" and not "SIZE".ĭisclaimer - these bolt heads have been measured by several people using different measuring 'tools'. I hope you can see from the spreadsheet that this is not necessarily correct. Tradition has it that the bolt head "numbers" fall within the following dimensions : As some of you may remember I have been compiling a spreadsheet of bolt head sizes for a few years now, and, now having the dimensions for 220 bolt heads I thought it was time for an update.Īs you will see (and has been stated on numerous occasions) it is no use at all simply saying "I need a Number 3 bolt head" when (for example) a 0.632" up to 0.636" bolt head can be a number 0, a number 1, a number 2 or a number 3.
0 Comments
Leave a Reply. |