Rear bag position.

[Darwin]

Moved the rear bag back and it shot lower. Is that normal?

 

[caihlen]

Yep

 

[PigButtons]

Each rifle, rest, shooter, combination is a system unto itself. Not only can the position of the bags, where the fore end is resting, where the butt end is resting, but even the material inside the bags has an effect. Some rifles like heavy dense fill like lead shot, others like sand, or even rice. Point of impact, group size, name your problem, can all have multiple causes. It sometimes amazes me that we find solutions at all. Best we can do is be as precise as possible and learn to repeat what we find that works.

Don't give up and take good notes is the only advice I can give. Others will probably be more helpful.

 

[Bojo]

I shot 20 rounds last Saturday. Had some issues with my rear bag sliding on wear smoothed wooden benchs at a club near me.
Going back tomorrow with some rubber i cut that will be under my bag.

 

[LHSmith]

I shot 20 rounds last Saturday. Had some issues with my rear bag sliding on wear smoothed wooden benchs at a club near me.
Going back tomorrow with some rubber i cut that will be under my bag.

I fought that problem through many matches. A couple of fixes:
Wipe off the benchtop real well to remove dust, dirt, pollen etc. - then dampen the top slightly with a few drops of water. Repeat if your range session is long. This is especially needed for concrete tops.
Rubber might help, but it has to be the right compound for hardness. I bought 1/16 "anti-skid rubber matting from McMaster-Carr when I had this problem. Then I discovered that the first fix above was all that was needed. At a match I clean/ dampen every time I set up before relays.
Make sure you are not allowing the stocks pistol grip to contact the bag.
Slicken up the bag ears with talcum, silicon, used dryer sheets, etc. Waxing the areas that touch the bags is also a good idea.

 

[JEFFPPC]

Cut a piece of rubber to go around the out bag edges about 3/4 of an inch wide. Put it on the bottom of the bag with Elmers Rubber Glue. It will be a big help.

 

[BoydAllen]

I have a sheet of 120 grit sanding screen, the same stuff that you can commonly get for drywall pole sanders, die cut, only in a full sheet (9 x 11). It works beautifully on a plank bench top that is too slick without it. It has also worked well on a concrete top.

 

[Darwin]

Thanks guys. Just started to get my shoulder consistent. Then I could see my bags causing trouble. I wonder what I’ll find next.

 

[Bojo]

Some pretty smart shooters here !!!!

 

[1bamashooter]

I use rubber conveyor belting works well

 

[Sandstorm]

I used the rubber tool drawer liners from Snap on.

 

[Thumper]

I bought adhesive sand paper and mounted it on the bottom of my bag, then trimmed it to fit. This works well and it was fairly inexpensive. Our local ACE hardware sold it by the foot from a large roll.

 

[OmegaRed]

Little did we know, the OP has a slanted butt stock and a slanted rear bag. He slid the rear bag towards the back of the bench and it just pointed the barrel down. /thread

just had to

 

[Fuj]

I just added to my Protektor bag collection, their sand
edge rug. So far I'm liking it. I bought it to compliment
their heavy sand DR bag. On the smaller bunny ear
bags it works great. On one particular bag, I turn it
sideways and put the bag in the middle to catch the
front and rear bag edge.

 

[jackieschmidt]

I have experimented with this with my 30BR VFS Rifle.

Rear bag one inch from butt end to around four inches forward of it.

As long as I put the cross hairs in the same spot, the point of impact did not change at all.

here is were it is most comfortable.

 

[JFrank]

Thanks guys. Just started to get my shoulder consistent. Then I could see my bags causing trouble. I wonder what I’ll find next.

Been there about a hundred times.

 

[dkhunt14]

I shot 20 rounds last Saturday. Had some issues with my rear bag sliding on wear smoothed wooden benchs at a club near me.
Going back tomorrow with some rubber i cut that will be under my bag.

Shelf liner that you buy in a roll at Wal Mart works great. It seems as though you glue your bag fast to the bench. In time it will get hard and then replace it. Matt

 

[Mikemci]

Shelf liner that you buy in a roll at Wal Mart works great. It seems as though you glue your bag fast to the bench. In time it will get hard and then replace it. Matt

This is what I have done, and it works well.
I cut and glued the shelf liner to the bottom of the bag, so it's always there.

 

[Texas10]

I needed to elevate my rear bag about 3/4 inch so I cut a piece of 3/4" plywood slightly larger than the footprint of the bag, then put traction tape on both sides. Sits firm on the bench and the bag stays put.

Like this: https://www.amazon.com/dp/B01M63K167/?tag=accuratescom-20