Hello everyone,
I'm new to this forum, and have a question:
I just started reloading 300 Blackout, and this is my very first attempt at reloading.
I am using prepped brass from Carolina Brass, CCI #41 primers, and Sierra 125gr Matchking bullets, it's going to be fired from an AR pistol with a Noveske 10.3" barrel, and a BCM BCG, NOT suppressed.
When I finished the pistol, I ran some factory loads, 155gr HP, and it ran GREAT! I decided to go with the 125 gr Sierras, and after loading a few, I found myself "chasing" the COL. According to Hogdon, using this bullet and H110, I should have a COL of 2.060. I set my Redding bullet seating die, and after a while, was able to nail it to the recommended COL. Well, after a few rounds, it started "jumping" around...being new to this, I was LOST! The shortest round is probably 2.054 or 2.055, the longest 2.062. After cussing for hours, I decided to measure the bullets, and found (as stated in other posts elsewhere) they varied quite a bit.
I read about measuring from the "Ogive", and I think I understand the concept. Although I see the significance of getting the right "chamber" length, how does that help with the COL? My concern (keep in mind I am a rookie) is that I don't know what LENGTH bullet the load data is using, and as I found out, 125gr can mean a LOT of different lengths! So, even if I measure from the "Ogive", how do I determine the proper seating depth in order to not create excessive pressure?
I believe the starting load is 16.7gr, and the max is 17.8, I loaded all of them right at the starting load, so I assume I have some "BUFFER", but it does not feel comfortable. If I measure from the Ogive, what is my "standard" for making sure the seated depth is correct? the load data only gives COL, which I think we can all agree is very much dependent on the length of the bullet, which VARIES quite a bit!
Is the variance between 2.060 and 2.054 enough to worry about?
I hope someone out there can read this and understand my rookie confusion and give me some guidance!
thank you in advance!
I'm new to this forum, and have a question:
I just started reloading 300 Blackout, and this is my very first attempt at reloading.
I am using prepped brass from Carolina Brass, CCI #41 primers, and Sierra 125gr Matchking bullets, it's going to be fired from an AR pistol with a Noveske 10.3" barrel, and a BCM BCG, NOT suppressed.
When I finished the pistol, I ran some factory loads, 155gr HP, and it ran GREAT! I decided to go with the 125 gr Sierras, and after loading a few, I found myself "chasing" the COL. According to Hogdon, using this bullet and H110, I should have a COL of 2.060. I set my Redding bullet seating die, and after a while, was able to nail it to the recommended COL. Well, after a few rounds, it started "jumping" around...being new to this, I was LOST! The shortest round is probably 2.054 or 2.055, the longest 2.062. After cussing for hours, I decided to measure the bullets, and found (as stated in other posts elsewhere) they varied quite a bit.
I read about measuring from the "Ogive", and I think I understand the concept. Although I see the significance of getting the right "chamber" length, how does that help with the COL? My concern (keep in mind I am a rookie) is that I don't know what LENGTH bullet the load data is using, and as I found out, 125gr can mean a LOT of different lengths! So, even if I measure from the "Ogive", how do I determine the proper seating depth in order to not create excessive pressure?
I believe the starting load is 16.7gr, and the max is 17.8, I loaded all of them right at the starting load, so I assume I have some "BUFFER", but it does not feel comfortable. If I measure from the Ogive, what is my "standard" for making sure the seated depth is correct? the load data only gives COL, which I think we can all agree is very much dependent on the length of the bullet, which VARIES quite a bit!
Is the variance between 2.060 and 2.054 enough to worry about?
I hope someone out there can read this and understand my rookie confusion and give me some guidance!
thank you in advance!