300 Blackout reloads won't chamber
Moderators: gds, bakerjw, renegade
-
- New Member
- Posts: 4
- Joined: Sun Mar 01, 2015 11:58 am
300 Blackout reloads won't chamber
Reloading 300 Blackout using Siera 220gr subsonic with RX7, 12grains. COL 2.245 as per AR15 load book said COL of 2.260. Once I seat the bullet it will not chamber. Does any one have a suggestion? Brass is pre primered from Detroit Ammo Co.
Re: 300 Blackout reloads won't chamber
Where are they hanging up?
Have you put any crimp on these?
Have you put any crimp on these?
Re: 300 Blackout reloads won't chamber
improperly sized. Making a dummy round with no powder I'd pull the decap pin and run one through the die, and reseat a bullet. Try that. I always full length size new/primed brass, never trust them to do it. Right.
Re: 300 Blackout reloads won't chamber
If I had to guess, it sounds like you are applying crimp with your seating die and deforming the case a little. Try backing the crimp off completely. If that works, buy a Lee FC die and crimp in a separate step.
- plant.one
- Silent But Deadly
- Posts: 6823
- Joined: Tue Jun 23, 2009 8:31 pm
- Location: Oakland County, MI
Re: 300 Blackout reloads won't chamber
can you post a pic of some of the ammo in question
Reloading info shared is based on experiences w/ my guns. Be safe and work up your loads from published data. Web data may not be accurate/safe.
This disclaimer will self destruct in 10 seconds.
This disclaimer will self destruct in 10 seconds.
Re: 300 Blackout reloads won't chamber
Had same problem at first. Play with the crimp adjustment on dummy's till you get it right.
It's very critical of col.
Get a lee factory crimp die and do it in two steps. Not as critical about case legnth.
It's very critical of col.
Get a lee factory crimp die and do it in two steps. Not as critical about case legnth.
-
- Silent But Deadly
- Posts: 3808
- Joined: Wed Jun 13, 2012 9:01 pm
Re: 300 Blackout reloads won't chamber
Man I love my Sheridan Ammo Gauge just for this reason
-
- New Member
- Posts: 4
- Joined: Sun Mar 01, 2015 11:58 am
Re: 300 Blackout reloads won't chamber
They won't even go in the feed ramp. End of the brass is almost even with the feed ramp. Bolt just hits them but won't move the bulletin at all.DragonAzz wrote:Where are they hanging up?
Have you put any crimp on these?
Re: 300 Blackout reloads won't chamber
What is the case legnth
Re: 300 Blackout reloads won't chamber
And will the gun run with factory ammo?
Who is online
Users browsing this forum: No registered users and 8 guests