I measured my 284 with 180 gr smk at the beginning of the season. I took about 500 shots with it this season. New Bartlein 5r barrel, only shot in match conditions. I use 4831sc, 53 grains. I measured the distance to the lands and it has grown .060. Is this normal for a 284?
284 throat errosion
- Thread starter C. Collins
- Start date
I think that is OVER 300 percent MORE "growth" than what I have experienced and I shot Shehanes. There is not too much difference but it does shoot with a greater powder charge over the .284.. My experience with the Shehane is about 2-3 thousandths erosion per 100 rounds, competition or not.
I was very surprised with this much growth as well. I am cleaning every 80-120 rounds. The most I shoot in one day is about 70 rounds. I try to shoot on the slower side. I am curious what everyone else is experiencing.
chefpierre said:
My first Shehane only lasted 1400 rounds. I was having trouble staying in the 10 ring even with a steady, mild wind. I took it to my 'smith who looked at the barrel with his Hawkeye. I had "fairly significant" but not out of the norm, throat erosion. BUT I had VERY SIGNIFICANT firecracking for over 6 inches! I think I had a barrel with some "weaker" for lack of a better term, steel. On the other hand, I had a 6.5 x 284 that lasted almost 1800 rounds! It could be that variations in barrel steel(s) will allow for either quick or a slow(er) erosion of the barrel itself, including the immediate throat area.. I am not a metallurgist, I can only give you my experiences..
Thank you for your thoughts.
Yes, the hornady tool.
The diameter of the Hornady tool can run small in size, giving you a measuring point on the bullet ahead of where it actually contacts your rifling. This forward point can vary on different bullets of the same make. Also was your initial measurement made with a brand new barrel before any rounds were fired? I'm not saying this is a fact, but a fresh cut chamber might have a crisp transition to the rifling that could round off and give a quick change in measurements.
Keith Glasscock
Gold $$ Contributor
The bigger question is about burrs in the throat. I've had a barrel that had burrs that would stop the bullet cold well short of the lands.
Did you do your initial measurement before firing the first few rounds?
Did you do your initial measurement before firing the first few rounds?
Measured after break in. Then again 500 rounds later. It is very eye opening. I guess I need to measure before each match when making loads.
Keith Glasscock
Gold $$ Contributor
That wear rate is well beyond anything I've experienced with my 284. Heck, 1300 rounds in, I have ~.030 total.
I wish it wasn't true. I am going to do a 600 yard practice tomorrow and load them .015 off. This was my sweet spot, and see how she does.
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