I shoot a 300 RUM with both 180 and 200 AB's and get excellent accuracy using Retumbo. The boys I shoot with are running RL 25 at a max of 95 to 96 with 180's. Load sounds a bit hot. Try backing down to 94 grs. and work up. Food for thought. [img]/ubbthreads/images/graemlins/smile.gif[/img]
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and so do hornady sst's..
i have a 300 rum and it likes neither the 180 gr., nab's, even set as close as .10 off, nor 180 gr. hornady sst's...
i have tried different powders, re-25 seems to work the best, tried different oal lengths...
and it will not shoot a nab under a 3.5 x 3.0 inch group.
but, it loves 168 gr. barnes tsx's...
now what's up with all this ???
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It's been my experience that if NAB won't work, then something is terribly wrong. They work in everything I shoot them in. The problems you are having and the groups you are quoting are way worse than the factory loads I tune for my hunting buddies. I w0uld be interested to see if the barrel is the issue in either bore size or the choke missing at the muzzle.
If all else fails, change the shooter and start all over.
Exactly what was done to true the receiver and barrel? I ask because unless the barrel threads were cut off and refitted, you can not completely accurize the receiver because the receiver threads need to be recut.
Just curious as to what amount of work was actually done to the rifle.
No rifle will shoot every bullet. To think they will is not practical. Even full custom rifles will prefer certain bullets over others.
I really do not see a problem, you have a load that your rifle likes and it is plenty suitable for any game up to elk.
My simple recommendation which is the same I give to my customers, listen to your rifle, feed it what it wants. It is not the Accubonds fault that your rifle does not like them.
Shoot what shoots well.
Allen Precision Shooting
Home of the Allen Magnum, Allen Xpress and Allen Tactical Wildcats and the Painkiller Muzzle brakes.
Uh, where is your front bag or rest? It's not uncommon to have a rifle that will not group off a bi-pod. My 300Wby does the same thing with 200AB's but over the bags it is consitantly below .5's when shot off of bags front and rear. I seat at 3.7" or at about .250" off the rifling for best results. I forgot the actual measurement as I have found they always work best in every gun I shoot them in to just seat for the magazine box.
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