This is more of a rifle question, but I'm posting it here because I figure we loaders deal and care about throat erosion more than the average rifle shooter. (The gun in question: A Rem 700 SPS Varmint - bull barrel - in .243. It's a target gun only. And I've generally pushed very heavy - i.e. long - bullets through it. I figure they're a bit tougher on the barrel. It gets pretty warm pretty quickly when shooting these heavy bullets.)
I've kept records of the distance to the lands (over time) for various bullets I load for this gun. (I periodically check the distance and log it....so I can see how throat length has changed over time.)
Over the last 5 months I've seen what I think is a big erosion: My distance-to-the-lands measurement has grown .030" over 5 months. It's definitely the largest gain I've had in this gun over that kind of timeframe. I have shot a good amount through it in that time - probably 400-500 rounds. Total number of rounds through the gun is on the order of 1,200-1,300. I've read anecdotally .243 barrels tend to get shot out relatively quickly.....1,600-2,000 rounds or so.
Does anyone have experience for what sort of erosion they've seen in a stock Rem .243 barrel when the barrel was done? I figure this is kind of a long shot (ROFL) question....but I'm wondering if these measurements I'm seeing can be put in a broader context to get a gauge on when this barrel might throw in the towel.
Right now it's still shooting well. So performance on the range is still strong. I figure that's the ultimate measure: Can it still shoot.
Any experiences or comments?
Thanks!
OR
I've kept records of the distance to the lands (over time) for various bullets I load for this gun. (I periodically check the distance and log it....so I can see how throat length has changed over time.)
Over the last 5 months I've seen what I think is a big erosion: My distance-to-the-lands measurement has grown .030" over 5 months. It's definitely the largest gain I've had in this gun over that kind of timeframe. I have shot a good amount through it in that time - probably 400-500 rounds. Total number of rounds through the gun is on the order of 1,200-1,300. I've read anecdotally .243 barrels tend to get shot out relatively quickly.....1,600-2,000 rounds or so.
Does anyone have experience for what sort of erosion they've seen in a stock Rem .243 barrel when the barrel was done? I figure this is kind of a long shot (ROFL) question....but I'm wondering if these measurements I'm seeing can be put in a broader context to get a gauge on when this barrel might throw in the towel.
Right now it's still shooting well. So performance on the range is still strong. I figure that's the ultimate measure: Can it still shoot.
Any experiences or comments?
Thanks!
OR
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