Originally Posted by phorwath
Some members in a separate thread described tuning their bolt action rifles for optimum accuracy by adjusting the torque on their actions screws. I've never tried this before. Some posted some large reductions in group sizes by lightening or tightening the torque on the action screws.
How many have tried this enough to confirm that groups sizes will shrink or enlarge with different action/bedding screw torque on bolt action rifles? Care to share your approach and thoughts?
I've been experimenting with action screw torque for about four or five years now. I started out with a regular 3/8th's torque wrench (one with a dial), and now use a precesion 1/4" drive wrench made like a screwdriver. At this time I'me using two different settings for the screws. The front ones are set at 40 in. lb. and the rear is set at 35 in. lb. on a couple Savages. My Remington is still in the learning curve, but the 35 in. lb. values seem to be a good starting point. I do coat my threads with Never Sieze, and bring the bolts down in ten in. lb. increments. Funny thing was that when I checked the break away torque after tightening the bolts down I was getting slightly less than 50 in. lb. I have not done any experimenting with my Weatherby rifles, so I can't say alot about them.
If your shopping for a wrench, be sure to get one that will put the window your torque values are in somewhere in the middle of it's range. The bottom 20% and the top 20% are not all that accurate in most wrenches. They also make them in two different grades. A 5% and a 10% accuracey wrench. Look for the 5% as they are built better and will keep their calibration much longer. Stay away from the ones that donot use a dial or a wand. The break over ones are known to over torque screws easilly. They make digital read out ones, but they are way too expensive, and not really needed. Also use a good allen socket! A worn out cheap one will give you a false reading.