01-15-2018, 01:12 AM
bj139 Wrote:That middle bolt looks awfully thin. Are you sure thats not a 6.5 Grendel bolt?
Here is a photo from a site selling SPC bolts of an SPC bolt. They are out of stock.
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Those bolts in the photo are mine. Middle is definitely a worn-out 6.8 SPC bolt from 2009-2010 back when SPC bolts were basically just milled out 223 bolts... The face on that particular bolt got pushed in and the sides worn from use.
The takeaway is "what will the sidewall thickness be when a standard 223 bolt is drilled out and how will it hold up?"
Modern SPC bolts now have a greater outer wall circumference so the walls can be thicker - similar to the ARP bolt up top.
"...SPC bolts of an SPC bolt?" (?) Not following...