CitationTen Posted September 2, 2019 Report Share Posted September 2, 2019 Hi Has anyone any experience of having copper projectiles machined in small batches, of say 2000? Thinking bar fed CNC. Looking for around 10 mic of total runout, surface profile also of 10 mic and Ra of 0.8 Will supply nominal supplied CAD data in STP I am looking to make 150 grain very high BC. 308 bullets with a long COAL Cheers Quote Link to comment Share on other sites More sharing options...
Ronin Posted September 2, 2019 Report Share Posted September 2, 2019 Many of us use Lathe Turned Solids (LTS) here Either for deer or target on field firing ranges. GS Custom being my preferred provider, others use Warner Flatlines, Barnes etc A 150 g LTS will be very long and will probablty require a gain twist barrel to avoid damage to the outer surface There is (was) a guy in the UK who makes LTS Bernie Montanna - not sure if he is still having them made, perhaps seek him out Quote Link to comment Share on other sites More sharing options...
CitationTen Posted September 2, 2019 Author Report Share Posted September 2, 2019 Thanks for that. Appreciate the help. Quote Link to comment Share on other sites More sharing options...
Lillico Posted September 4, 2019 Report Share Posted September 4, 2019 Try this website for GSC bullets. Johan is very helpful. http://www.t2ammo.com/index.php/GS_Custom I suggest you use TransferWise to pay, cheaper than a bank and very reliable. https://transferwise.com/ There are no import restrictions on expanding ammunition since the change of law regarding posting between individuals. I recommend a charge based test to get a series (two!) of horizontal groups. Explained here. Please note: It's nothing to do with the bullet holes being in a horizontal line, rather the relationship between adjacent groups. http://forum.accurateshooter.com/threads/long-range-load-development-at-100-yards.3814361/ Gerard Shultz recommends a 0.5 or 1.00mm (0.039 370 078 74") spacing for initial COAL testing. I found this too coarse and jumped right over the node. Run a series of bullet length tests at 0.006" intervals reduce this down to 0.003 when you have an indication that you're getting somewhere. I found these bullets to need at least 0.100" stand off, so you could start there. I found I got lots of advice on what other people do, but not much on HOW. I hope this helps. Quote Link to comment Share on other sites More sharing options...
srvet Posted September 15, 2019 Report Share Posted September 15, 2019 Try these https://www.haslerbullets.com/en/shop/hasler-long-range-en/ogive-lr-cal-338-da-231-grn-30pz/ http://www.acfirearms.co.uk/page21.html Quote Link to comment Share on other sites More sharing options...
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