How to make best target backing

[sublimaze41]

Please forgive me if this isn't the best thread to ask this question.....
I am trying to group a new Remington LTR rifle with various loads. The problem I am having is the target after the shots are fired. When I shoot various loads in .22-250 or 220 Swift the paper shows a clean bullet hole, round and true. When I shoot .308 rounds the paper is ragged and hard to size.
Basically I am looking for the best backing that will yield a clean bullet hole. Is it best to have a cardboard backing or someting else? Currently our range uses plywood with an insulation type backing on the front.

Thanks in advance

 

[kingmt]

I use cardboard.

 

[Bwana John]

Plasticized cardboard. I get it free, its available everywhere after an election.

 

[Mike1234567]

Most ranges I've been to use sheets of corrugated plastic... same basic construction as cardboard but made of plastic.

 

[cfullgraf]

I learned from a Service Rifle Match shooter to cut away the target backer directly behind where the bullet impact will be and shoot through just the target paper. Generally, he would cut out a circle the same as a the black of the SR-1 target, about 6" in diameter for 100 yard shooting.

The hole is made in thinner material and lighting from the back shows through easier.

At my home range, I use what is available. Mostly it is brown corrugate cut from old shipping boxes. My way of recycling and the price is right--free.

 

[amlevin]

What's wrong with big ragged holes? Easier to claim a "tight group".

 

[wingman]

Heavy cardboard with art paper in rolls make the best targets I've found.

 

[788Ham]

Use a piece of plasterboard if available, drywall.