Re: Accurate Subsonic Load
Posted: Thu Jul 16, 2015 6:15 pm
Especially not over 9.9 of 4227 @1.98 coal
What kind of loads were you shooting? Right now I have mine loaded to 2.10" and I've read people going all the way down to 1.90". I'll probably test that deviation in length with 8.5gr of Lil'Gun (~1060fps) out of my 8.2" Noveske. My grouping so far was "fist size" at 50 yards, but I was shooting with a Trijicon SRS. I just got a Vortex Diamondback HP 4-16 so I'm hoping to be able to tighten them up some!RDA wrote:You have your work cut out for you. I can get near 1 MOA (at 100 yards) with Nosler Custom Competition / Sierra Match King in 220 grain and Hornady AMAX in 208 grain from a 9" AAC barrel.Makaio wrote:I shoot a remington 700 aac-sd 300blk bolt gun. Can anyone suggest a sub load thats accurate out of my configuration. Factory hornady 208's and umc 220's are 2-3" at best. Id love to get some sub 1" groups.
Good luck with that, looking forward to your results, mine were not particularly good.polizei1 wrote:I'll be loading up some 240gr Leatherhead's in the next month or so when I have time and will be doing velocity/accuracy testing at 100yards.
viewtopic.php?f=141&t=94674polizei1 wrote:What kind of loads were you shooting? Right now I have mine loaded to 2.10" and I've read people going all the way down to 1.90". I'll probably test that deviation in length with 8.5gr of Lil'Gun (~1060fps) out of my 8.2" Noveske. My grouping so far was "fist size" at 50 yards, but I was shooting with a Trijicon SRS. I just got a Vortex Diamondback HP 4-16 so I'm hoping to be able to tighten them up some!RDA wrote:You have your work cut out for you. I can get near 1 MOA (at 100 yards) with Nosler Custom Competition / Sierra Match King in 220 grain and Hornady AMAX in 208 grain from a 9" AAC barrel.Makaio wrote:I shoot a remington 700 aac-sd 300blk bolt gun. Can anyone suggest a sub load thats accurate out of my configuration. Factory hornady 208's and umc 220's are 2-3" at best. Id love to get some sub 1" groups.
Good luck with that, looking forward to your results, mine were not particularly good.polizei1 wrote:I'll be loading up some 240gr Leatherhead's in the next month or so when I have time and will be doing velocity/accuracy testing at 100yards.
I have pretty good success with my powder drops out of my 650. Ball powder meters wonderfully, extruded/stick powder can be a little more challenging. My reloading room is dry and temperature controlled which I believe helps. I have seen SDs down in the 4-5 range with N320 which is the most consistent powder I have used (and that is an extruded powder as well).polizei1 wrote:RDA I'm interested in getting out to test them now. I really want to see more data on these. I'm also surprised that you're getting the SD's you are on the 650. I've been reloading pistol for a few years now and I'm not able to get that close, I probably average ~20-30 SD. I even have the bearings and clipped spring!
I had loaded and shot some at 2.080" but found 2.085" would reliably operate in my 9" AAC barrel and 2.100" would reliably operate in my 10.5" Ballistic Advantage barrel.polizei1 wrote:I also noticed while loading the dummy loads, 2.18" would work in my Noveske. I loaded probably ~50 rounds as my initial test and got to the range and found out they wouldn't chamber, I thought that was very odd. I backed them down to 2.10" and went to the range again and out of ~50 rounds last time, 2 wouldn't chamber, so I'm thinking of dropping the OAL down even more.
What's the shortest you've gone? 2.078"?
I don't have a 300 Blackout 16" barreled upper built currently (although I have a 16" barrel sitting here and parts trickling in). But, the OAL is based on the chamber, not the barrel length.Makaio wrote:RDA, whats your oal for the 16" barrels
Some posters, yet again, have been talking about ar's in a bolt gun thread which confuses things.Makaio wrote:RDA, whats your oal for the 16" barrels
Sorry about that, I thought it was an AR thread and misread the OP in my haste.rjacobs wrote:Some posters, yet again, have been talking about ar's in a bolt gun thread which confuses things.Makaio wrote:RDA, whats your oal for the 16" barrels