300BlkTalk

I have been using a load I like for the Sierra 220gr SMK that is very accurate but will only cycle the bolt suppressed: My rifle is a Noveske 10" 300BLK Pistol length gas system 10", 1:7 H2 Buffer Hornady 300BLK Brass CCI 400 Small Rifle Primer 8.6gr Hodgdon lilgun 2.120" OAL Medium c...

Yes, you can order them directly from Barnes or anyone else.....IF they have them in stock, which no one has for a very long time.

Sierra 220gr SMK Noveske 300BLK Pistol length gas system 10", 1:7 MagPul PMAG, 30RD 220gr Sierra SMK A1680 10.9gr New Remington primed 300BLK brass 2.089" OAL 3/4 turn medium crimp Lee FCD No Chrono yet Zero Issues on any of the loads. All feed, fire, and eject fine. Bolt held open on las...

So today I tested some worked up loads of the Sierra 220gr OTM. I just got a Shooting Chrony Master Beta to check velocities. My rifle is a Noveske 10" 300BLK Pistol length gas system 10", 1:7 H2 Buffer LC 5.56, reformed to 300BLK CCI 400 Small Rifle Primer Hodgdon lilgun 2.120" OAL ...

So today I tested some worked up loads of the Sierra 220gr OTM. I just got a Shooting Chrony Master Beta to check velocities. My rifle is a Noveske 10" 300BLK Pistol length gas system 10", 1:7 H2 Buffer LC 5.56, reformed to 300BLK CCI 400 Small Rifle Primer Hodgdon lilgun 2.120" OAL M...

OK, so tonight I tried making some adjustments. One note is that the bullet I loaded tonight is different than what I experienced before.....I know...I know...that makes it apples to oranges. Previously I was loading Sierra 125gr OTM and tonight I loaded Sierra 220gr SMK. At first I tried backing ou...

dellet wrote:and also gauge between seating and crimping. You never know.

Will do. I have received a lot of great suggestions that I can hopefully try tonight.

After sizing my LC brass it measures around .328 at the neck and around .360 to.361 just below the shoulder using Hornady or Redding FL dies. I set my FL die to touch the shell holder and lock the ring and then back off my FL die about 1/16 turn on the press to let the brass and die center itself b...

The SIZING die is set allowing contact. The SEATING die needs clearance. You also said that after seating/crimp you then crimp again with a Lee die, Have you ever gauged between these steps? maybe the problem is where you think. Not sure what problem a double crimp might create. It is indeed a FL d...

If it only does it occasionally it will be difficult. Clean the gauge and rounds well that won't gauge. Use a sharpie to blacken the rounds and check them again, it should clean the brass where it hits the gauge. You also did not say if you are de-burring the inside of the case mouth or not, the sl...