So I've been reloading for a while, and have been noticing that small marks are showing up on my bullets if I chamber and extract them. It starts right at the ogive(or as near as I can tell) on the bullet, and causes a scrape about 1/10" long and continues for about 1/6" around the circumference of the bullet.
In order to help narrow down the cause, I used a hornady OAL guage in order to confirm that I had the correct OAL/Ogive (Typical method, insert several times, took the average and subtracted 3/100"s of an inch). I had another person check it as well. We sooted the bullets before inserting in order to see the marks more clearly. And sure enough they showed up, which eliminates extractor/feeding issues.
Now forcing the bullet into the the barrel then removing clearly shows the expected ring in the soot for the bullet contacts the lands, this additional rub mark ends at the ring and continues the aforementioned 1/10" toward the bullet tip.
The same mark shows up on all of the bullet types I've tried. (10 different bullets of varying brand and style)
The mark appears at the exact same spot on each bullet around the 3-4 o'clock position (when looking down the barrel from the chamber)
Mark doesn't seem to affect accuracy/precision.
Rounds need to be seated down to 2.26" OAL in order to ensure no mark (and seating that deep causes my precision to suffer)
Gun is a Savage M10 in .223.
I Have heavily cleaned the gun with no change.
I'm beginning to suspect that my chamber may have a small burr, or that one spot in the chamber is just less than the req'd diameter.
Sorry for the poor pic its hard to photograph something so small. I've tried outline the marks with an overlayed black line.
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Thanks, hope someone here can shed some light on my situation
In order to help narrow down the cause, I used a hornady OAL guage in order to confirm that I had the correct OAL/Ogive (Typical method, insert several times, took the average and subtracted 3/100"s of an inch). I had another person check it as well. We sooted the bullets before inserting in order to see the marks more clearly. And sure enough they showed up, which eliminates extractor/feeding issues.
Now forcing the bullet into the the barrel then removing clearly shows the expected ring in the soot for the bullet contacts the lands, this additional rub mark ends at the ring and continues the aforementioned 1/10" toward the bullet tip.
The same mark shows up on all of the bullet types I've tried. (10 different bullets of varying brand and style)
The mark appears at the exact same spot on each bullet around the 3-4 o'clock position (when looking down the barrel from the chamber)
Mark doesn't seem to affect accuracy/precision.
Rounds need to be seated down to 2.26" OAL in order to ensure no mark (and seating that deep causes my precision to suffer)
Gun is a Savage M10 in .223.
I Have heavily cleaned the gun with no change.
I'm beginning to suspect that my chamber may have a small burr, or that one spot in the chamber is just less than the req'd diameter.
Sorry for the poor pic its hard to photograph something so small. I've tried outline the marks with an overlayed black line.
Thanks, hope someone here can shed some light on my situation
