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Rear bag moving

Badhabit

Ok I'm really new to benchrest shooting, and I'm having trouble with my rear bag moving on the bench at the shot. Our local club benches are wood and im using a protektor bag. Everyone i talk to does something different, what is the best way to keep it from moving around? Thanks
 
I have tried a number of things to keep bags from moving. The problem with some of them is that the materials are compressible. You can slightly rock the bag if you use them. For free recoil I do not find this desirable. What I use, I read about on a forum some time ago and finally got around to trying when a friend complained of the same problem that you have. I found that a local independent hardware store stocks full sheets (not the usual die cut small pieces) of sanding screen. I think that what I bought is 120 or 150 grit. It works perfectly for my friend as well as for me. I think that there are a lot of shooters who are shooting without a hand on their rear bag, who may be getting a small amount of bag movement that degrades their results.
 
Badhabit said:
Ok I'm really new to benchrest shooting, and I'm having trouble with my rear bag moving on the bench at the shot. Our local club benches are wood and im using a protektor bag. Everyone i talk to does something different, what is the best way to keep it from moving around? Thanks
Click to expand...
Heavy sand or sand box ?? Tommy Mc
 
I use bag wax and the no slip tape. It also helps to have a rear bag with a thick base and tall ears.

PopCharlie
 
Trex is a dumb idea for a bench top. My club just replaced the bench tops with it. It is way too slippery!

Shooting benches need a continuous, one piece top - THINK CONCRETE. Wooden benches tend to move around, especially when they have seats attached to them!
 
Badhabit said:
Ok I'm really new to benchrest shooting, and I'm having trouble with my rear bag moving on the bench at the shot. Our local club benches are wood and im using a protektor bag. Everyone i talk to does something different, what is the best way to keep it from moving around? Thanks
Click to expand...
I use a Edgewood Gator Heavy sand . I just does not move. Tommy Mc
 
I got a edgewood dead bottom for my small bag. It wasn't that the center bottom bulged it was the outer rim edges didnt grab. My 30br made it walk.
Mine is a small rear bag. Idk if they make one for larger bags.
Maybe a new bottom, a spacer.
Protektor may make one, idk.
edgebag.com

Dead Bottom

The Deadbottom will correct any bottom "bulge" that can develop on worn out bags. It also creates a flat surface to stabilize any bag and increases the overall height by 3/4". All Edgewood products are hand made. Please allow 3-4 weeks for delivery.
edgebag.com edgebag.com
 
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The rubberized mesh used for drawer liners is cheap; can be cut to size, and works as well on wood or concrete (and likely most other surfaces.) If you want something a little more durable, go to McMaster-Carr and buy some neoprene sheeting and cut to size. You can glue it to the bottom of the bag if desired, or cut it a little large and use it as a separate base layer before putting the bag down.

Edited to fix typo's. Haven't woken up yet, apparently.
 
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Wipe the top with a damp cloth to remove dust and pollen and possibly leaking sand. Spread a small amount of water on the bench top. Do this before every relay. Wax the stock, use talcum powder on leather ears or vigorously brush cordura ears clean to minimize friction. When setting up initially, use a long straight rod (I use a golf club) to ensure the rear bag perfectly lines up with the front bag and target. Mark the rest and bag locations with magic marker. If it still moves, get a bag that has a dead bottom (hollow) and fill the base with heavy sand.
 
I just cut a piece of 100 grit sandpaper and put it under the rear bag with the cutting side towards the bench. Works great on a Trex covered bench.
 
I can't think of a worse material to use for a shooting bench top than a composite material like Trex. It is slippery. It will expand and contract with changes in temp.- beware of POA changes if the top is exposed to the sun and you have intervals of clouds and sun. Ever construct a deck making the buttjoints perfectly gap free only to discover the next morning you have 1/4"gaps? I realize the expansion is more pronounced in long runs, but the material will move in all directions including thickness. It is structurally not very strong- it sags between joists requiring some deck designs to use 12" centers- and it still will show a slight sag. With wood the holes left from the points of the rest feet will close up to some degree from swelling- no so much with Trex and you will compromise the plastic coating that envelopes the composite to keep it from forever attracting mildew.
 
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