phecksel Posted August 13, 2022 Share Posted August 13, 2022 Trying to get 300 BLK set up on my 650, with Accurate 1680. It is not going so well Hodgon website calls for COL of 2.089 with 220gr SIE HPBT. With CFE BLK and H110, it calls for COL of 2.260 To get to 2.089 on a Hornady ELD-X, seating die is literally cranked all the way down, and it's indenting the bullet while seating it. I'm wondering if I'm actually compressing the powder. The the fact that 1680 is so much shorter, seems somewhat odd to me. Where do I go now? Quote Link to comment Share on other sites More sharing options...
Nathanb Posted August 13, 2022 Share Posted August 13, 2022 Cfe blk is very similar to 1680 and 2.089 seems really short to me what's the Saami spec for 300blk. It’s been awhile since I’ve loaded any Quote Link to comment Share on other sites More sharing options...
phecksel Posted August 13, 2022 Author Share Posted August 13, 2022 (edited) 1680 - 10.9g max v=1,085 pressure = 32,300 CFE BLK - 12.1g max v=1,060 pressure = 18,200 SAAMI 55,000 COL 2.260 Edited August 13, 2022 by phecksel added additional info Quote Link to comment Share on other sites More sharing options...
phecksel Posted August 13, 2022 Author Share Posted August 13, 2022 H110 looks to be very close on the chart to 1680 9.2g V=1,046 28,100 psi Quote Link to comment Share on other sites More sharing options...
phecksel Posted August 13, 2022 Author Share Posted August 13, 2022 Took a step back and grabbed the barrel. Looks like 2.142, bullet is just starting to hit the lands Quote Link to comment Share on other sites More sharing options...
Nathanb Posted August 13, 2022 Share Posted August 13, 2022 If I can remember where my stash of 300blk is I’ll mic mine when I get home. I’ve got some factory 220s as well for oal Quote Link to comment Share on other sites More sharing options...
cvincent Posted August 13, 2022 Share Posted August 13, 2022 According to my notes (haven’t loaded it in awhile) but my data is 11.2 grains 1680, at 2.089 oal. Avg velocity of 991. 220 grain coated lead bullet. Used to be leatherhead, now gallant bullets. Maybe double check your seating die. Doubt you are compressing the powder of your putting 11 ish grains in there. Quote Link to comment Share on other sites More sharing options...
Nick_shoots_fast Posted December 23, 2022 Share Posted December 23, 2022 I use 1680. 220g smk 11 grains at 2.1 OAL. (just over 1k FPS). That’s ok for me. It’s just a fun gun for the kids to shoot suppressed without ears and hear the massive THUD when it hits steeel Quote Link to comment Share on other sites More sharing options...
NOSHMJ Posted February 12 Share Posted February 12 I use 10.0 grn A1680 with a 220 lead projectile at 2.20 Works perfect. Quote Link to comment Share on other sites More sharing options...
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