My 300BLK eventual SBR build
10-27-2013, 01:34 PM
#1
My 300BLK eventual SBR build
I started out with seekins billet receivers, with the upper being the iRMT-r for a 15" MCSR rail to hang off of. For now itll sport a 16" noveske barrel but that will be replaced later.
The rest of the build is fairly standard:
BADASS safety
Giessele SSA-E
PSA LPK minus FCG
WMB NicB BCG
Raptor ambi CH
Magpul UBR in FDE
Magpul MOE+ grip in FDE
YHM QD flash hider for my can
Aero Precision 30mm lightweight scope mount
Once my SBR stamp gets approved the 16" barrel will get replaced with an 8.2" noveske barrel. That's another reason I went with the MCSR rail so that the can will fit inside the handguard. Once its all said and done with the short barrel the can should make for a 17ish inch "barrel" basically with 2" sticking out the end of the handguard.
Maiden voyage along with my new Noveske build which shot well too. Can you tell I like Vortex optics?
Right at an inch 4 shot group with some Hornady 125gr SSTs. I think it can do even better with a little more load tweaking and me being more careful shooting. I was running out of time and wanted to get through all my load development so I can tweak in the final loads the next time. 110 vmaxs, 125 SSTs, 125 noslers, 147gr M80 pulls, 208 amax subs, 220 smks, all functioned perfect with and without the can. I believe my vmax load will end up around 20.2gr of H110, and the 125 SST hunting rounds around 18gr. It seems like the heavier pills like to be pushed harder so Im going to load up some hotter rounds and see what they do. Overall Im very happy with the way it shot.
Need to figure out what the ejection issue is on a few rounds. Not sure what rounds they were as I didn't notice it til I was packing things up. I put about 100 rounds through it both subs and supers that were suppressed and unsuppressed so it coulda been any of them. But Im purely guessing it was the unsuppressed 208gr amax subs as those are the only ones I shot just a few of and it doesn't look like too many hit the ejection port. All the rest hit the shell deflector perfect at the end.
After initial load development I tore it down and sent it off to a local cerakoter
Then I got it together in its final configurationish. The toy fund is tapped out til next paycheck when Ill order a UBR in FDE to finish it off. With the can hanging off the end its definitely front heavy so the heavy stock helps a lot with the balance. Overall Im very happy with the way it turned out. The cerakote color matches the magpul FDE pretty dang close. Its a PITA getting it together without scratching it but I got it done and was a chance to deep clean the rifle as its seen a lot of suppressed rounds since Ive built it and you could tell by how dirty all the components were. Hope to take some hogs and a deer or two this weekend with it.
Jim as usual did a great job and was super easy to work with. He didn't miss any angles on this IMO very faceted upper and lower combo. The color is consistent throughout and as I said matches pretty darn close. When I get my glock 21 I will be getting him to coat the slide FDE as well for me.
Now the wait begins for my form 1 to come back so I can throw the 8" barrel on, which it looks like I may be lucky if I get before next deer season. Its going to be hard to just forget about it but until then this thing ought to keep me happy. Im loading up what I believe will be my final loads for load development and should be good to go for putting meat on the ground this week.
The rest of the build is fairly standard:
BADASS safety
Giessele SSA-E
PSA LPK minus FCG
WMB NicB BCG
Raptor ambi CH
Magpul UBR in FDE
Magpul MOE+ grip in FDE
YHM QD flash hider for my can
Aero Precision 30mm lightweight scope mount
Once my SBR stamp gets approved the 16" barrel will get replaced with an 8.2" noveske barrel. That's another reason I went with the MCSR rail so that the can will fit inside the handguard. Once its all said and done with the short barrel the can should make for a 17ish inch "barrel" basically with 2" sticking out the end of the handguard.
Maiden voyage along with my new Noveske build which shot well too. Can you tell I like Vortex optics?
Right at an inch 4 shot group with some Hornady 125gr SSTs. I think it can do even better with a little more load tweaking and me being more careful shooting. I was running out of time and wanted to get through all my load development so I can tweak in the final loads the next time. 110 vmaxs, 125 SSTs, 125 noslers, 147gr M80 pulls, 208 amax subs, 220 smks, all functioned perfect with and without the can. I believe my vmax load will end up around 20.2gr of H110, and the 125 SST hunting rounds around 18gr. It seems like the heavier pills like to be pushed harder so Im going to load up some hotter rounds and see what they do. Overall Im very happy with the way it shot.
Need to figure out what the ejection issue is on a few rounds. Not sure what rounds they were as I didn't notice it til I was packing things up. I put about 100 rounds through it both subs and supers that were suppressed and unsuppressed so it coulda been any of them. But Im purely guessing it was the unsuppressed 208gr amax subs as those are the only ones I shot just a few of and it doesn't look like too many hit the ejection port. All the rest hit the shell deflector perfect at the end.
After initial load development I tore it down and sent it off to a local cerakoter
Then I got it together in its final configurationish. The toy fund is tapped out til next paycheck when Ill order a UBR in FDE to finish it off. With the can hanging off the end its definitely front heavy so the heavy stock helps a lot with the balance. Overall Im very happy with the way it turned out. The cerakote color matches the magpul FDE pretty dang close. Its a PITA getting it together without scratching it but I got it done and was a chance to deep clean the rifle as its seen a lot of suppressed rounds since Ive built it and you could tell by how dirty all the components were. Hope to take some hogs and a deer or two this weekend with it.
Jim as usual did a great job and was super easy to work with. He didn't miss any angles on this IMO very faceted upper and lower combo. The color is consistent throughout and as I said matches pretty darn close. When I get my glock 21 I will be getting him to coat the slide FDE as well for me.
Now the wait begins for my form 1 to come back so I can throw the 8" barrel on, which it looks like I may be lucky if I get before next deer season. Its going to be hard to just forget about it but until then this thing ought to keep me happy. Im loading up what I believe will be my final loads for load development and should be good to go for putting meat on the ground this week.
06-09-2014, 10:04 AM
#5
Its been a while since Ive updated this thread. I got the 9" AAC barrel on it back in December thanks to eforms being much faster than paper back then before the system went down. I was using the titanium phantom on it for a while but that was pretty loud so I bought a silencerco specwar 7.62 to bring the volume down a bit. While its a bit heavier than the phantom its definitely more quiet. Ive been having a lot of fun with this building. Finally got my 125gr SST load dialed in the way I want. This AAC barrel has been a PITA to get dialed in, much more difficult than the other 300blk barrels Ive loaded for. Just a couple tenths of a grain worth of powder difference goes completely in and out of an accuracy node but I found one. Got excited and pulled the last two shots but its plenty accurate enough for hunting.
Got a few more SBR and silencer projects in the works as well. My NFA addiction has definitely out vehicle stuff on the back burner
Got a few more SBR and silencer projects in the works as well. My NFA addiction has definitely out vehicle stuff on the back burner
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