Originally Posted by goose
Thanks for all the great ideas on the "usefull info from factory loads" thread, now that I have done some more shooting, the factory loads will not shoot well either.
I though it would be great to have a checklist of things that loosen up, wear out, or any other factors that would make a rifle no longer shoot well.
My rifle is a browning a-bolt 300wsm. It has seen less than 100 rounds. It once shot .750" to 1" groups at 100 yards very often. Recently I have shot several groups averaging 2.25"
I checked scope rings and mounts, everything seems to be tight, as well as the stock.
One thing I suspect is that I spent much more time and effort getting copper fouling out of the barrell before this all started. It was something I knew about vaguely, but learned about since using this site. I tried several methods and got slow but steady progress with sweets. It took aprox. 30 repetitions of the process described on the bottle. This was done after about 60 rounds fired through the rifle since new. I cleaned from the action toward the muzzle with a one piece coated rod and bore guide, however the bore guide was somewhat soft plastic.
When I bought the rifle several years ago, I also had "vague" knowlege of barell break-in. I "cleaned" the rifle several times in the first box of ammo with the bore-snake rope type cleaner, and no solvent. I imagine it was better than nothing, but highly double the barell was actually clean.
Any ideas? Has a checklist ever been made on this subject?
I will make a feeble attempt to list the things in order that I would do. and if these things have
already been done move on to the next item.
1=Check the chamber and the bore for fouling ( the chamber can sometimes get dirty and have
an adverse effect on accuracy.
2=Check action screws for tightness.
3=check scope base and ring screws(and windage screws on some bases.
4=Look for stock contact or pressure at tip (Walnut stocks will move and push on the barrel.
You can use a thin piece of cardboard or a dollar bill to see if it will slip between the barrel
and the stock.
5=look closely at the crown for signs of wear or nicks and dings.
6=shoot 1 round and crank in 8 or 10 clicks on the windage first and fire 2 or 3 rounds (if the
first round stays near the zero and the next one moves a couple of inches you have a scope
problem. next go back to original setting and repeat the process with vertical adjustment.
7=If all of these things check out then it is time to look at the reloading components for changes
In your post you said you did not break the rifle in when you bought it so if you cleaned it back
to bare metal clean then now is the time to break it in. fouling will prevent the barrel from
breaking in properly so shoot 1 round and clean and repeat until the bore feels greasy
smooth. This could take 10 to 20 shots depending on how good your barrel is.
I hope this helps you and if anyone has anything to add , Please Do !!!!!
J E CUSTOM