View Full Version : Maybe my 22-250 AI BBL is toast

01-20-2008, 02:50 PM
Ok so if the throat on my 22-250 AI is eroded . Can I cut some off and re-chamber for a 22 BR?

01-20-2008, 03:55 PM
If the barrel is long enough you can but be advised there is also erosion farther up the bore than you realize. You'd be ahead just to buy a new barrel. The cost of chambering is the same and you won't get the life out of the old barrel that you will with a new one.

01-20-2008, 06:41 PM
Before going to the expense of cutting the barrel back and rechambering, find someone with a borescope and take a good look at it. If you have a barrel with the throat visibly eroded, the borescope will likely show dry lakebed surface for 1 or 2 inches forward of there and then frosting and pitting for several inches forward of that. Not a good candidate for sinking any money into.
The 22-250 AI is a great round, but I won't use mine in a target rich environment such as prairie dogs or ground squirrels. I reserve mine for the more sedate pace of groundhog shooting.

01-20-2008, 08:43 PM
Problem was Bullets I think perhaps wrong powder also. Just walked in from a trip to local Rifle range. Fired Sierra 69 gr MK in front of 44grs of H4831SC. That combo produced 3,500 FPS and 1/2MOA Sierra manual said it would give me 3400 ??? Then I tried 38grs of H4350 same bullet and that produced 3,375 FPS ( Sierra book said it give me 3,200)and a buck shot pattern on target. Thought maybe bore was now a copper mine. Fired last two H4831 loads and they went into a 3/8MOA. So doesn't this mean my BBL is ok?

01-22-2008, 07:11 AM
My Hart 1 in 14" barrel in .22-250 AI has considerable throat erosion and firecracking after approx. 1200 rds., but is still shooting accurately. My load is a healthy dose of H380 with a 50 grn. Nosler Ballistic Tip with a velocity of 4150 ft/s. This is the price one pays; throat erosion and firecracking.