tag:blogger.com,1999:blog-1592992209402300549.post3294364822850530765..comments2024-03-29T07:33:41.566-04:00Comments on The Silicon Graybeard: This is Handy SiGraybeardhttp://www.blogger.com/profile/00280583031339062059noreply@blogger.comBlogger8125tag:blogger.com,1999:blog-1592992209402300549.post-11519712308386983602014-09-17T22:15:04.802-04:002014-09-17T22:15:04.802-04:00Thanks, daniel_day! It's amazing none of us c...Thanks, daniel_day! It's amazing none of us caught that, especially considering all the comments. <br /><br />185 grams! That's almost half a pound. (crunch crunch) 6.5 ounces. <br /><br />Quite a round. <br /><br />SiGraybeardhttps://www.blogger.com/profile/00280583031339062059noreply@blogger.comtag:blogger.com,1999:blog-1592992209402300549.post-4870171597916362012014-09-17T18:34:58.291-04:002014-09-17T18:34:58.291-04:00I'm 5 weeks late to this party, but "gram...I'm 5 weeks late to this party, but "grams" should be "grains" in the diagram noting the case weights.daniel_dayhttps://www.blogger.com/profile/18399665251275194585noreply@blogger.comtag:blogger.com,1999:blog-1592992209402300549.post-48313381232560543672014-09-06T17:35:48.493-04:002014-09-06T17:35:48.493-04:00DPMS will void the warranty on a 5.56 cal rifle is...DPMS will void the warranty on a 5.56 cal rifle is any but domestic ammo is used. The warranty is a bit over the top, but liability is very important to them I'm sure.Sarthurknoreply@blogger.comtag:blogger.com,1999:blog-1592992209402300549.post-38973962174635410352014-08-07T21:30:48.564-04:002014-08-07T21:30:48.564-04:00If this was a real problem, there would be reports...If this was a real problem, there would be reports all over the web. There have got to be people, lots of people, bubba included, shooting 308 and 7.62 on a more or less interchangeable basis. This incompatibility issue has been noted for years, and yet I have never actually heard of a blown up gun. Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1592992209402300549.post-12341598296414340862014-08-07T18:34:16.905-04:002014-08-07T18:34:16.905-04:00Anon - I don't work in the arms biz, but I kno...Anon - I don't work in the arms biz, but I know that in electronics systems and aircraft the Mil stuff takes on odd characteristics because they impose odd requirements the commercial stuff can't meet. <br /><br />As for why the commercial guys don't then adopt the mil specification ammo, that's probably due to cost. <br /><br />Angus - have you emailed the guys who made the chart, BulkAmmo.com? <br /><br />I've encountered the CUP vs. PSI issue on this ammo before. <br /><br />If I get a minute, I'll post the guidance I've had on this topic for a few years. <br /><br />SiGraybeardhttps://www.blogger.com/profile/00280583031339062059noreply@blogger.comtag:blogger.com,1999:blog-1592992209402300549.post-63674357676333304882014-08-07T16:44:06.424-04:002014-08-07T16:44:06.424-04:00One wonders why. Did the designers and engineers ...One wonders why. Did the designers and engineers get together over a few drinks and try to come up with some way to screw with people and maybe cause some accidents fatal and non-fatal? Were they simply oblivious of the other round when the second of these two (7.61/308 & 5.56/.223) was created? Did someone stand up at the design meeting and point out the risks and then was voted down? How do such risky situations exist when the people who create them are presumably intelligent?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1592992209402300549.post-2258175759797818862014-08-07T14:51:26.048-04:002014-08-07T14:51:26.048-04:00Plus, the proof round is 40% over-max pressure, so...Plus, the proof round is 40% over-max pressure, so a mil spec gun is designed to take 84,000 psi. (Even if the 50k CUP number was psi it'd still be within proofing at 70,000 for the 62,000 .308.)Angus McThaghttps://www.blogger.com/profile/09295013525738248801noreply@blogger.comtag:blogger.com,1999:blog-1592992209402300549.post-27463640907273291502014-08-07T14:47:54.167-04:002014-08-07T14:47:54.167-04:00Except that the "50,000 psi" for NATO is...Except that the "50,000 psi" for NATO is a typo, that's really CUP.<br /><br />Actual max pressure for NATO in psi is 60,000. .308 in CUP is 52,000.<br /><br />The amusing thing about this doom and gloom is every mil rifle that gets pictured as failing from ammo is shooting mil-surplus and not commercial.Angus McThaghttps://www.blogger.com/profile/09295013525738248801noreply@blogger.com