Here are  couple of options for you range bag to deal with squibs. You must have one because sooner or later squibs do happen even if you shoot factory ammo.

Safest choice for barrel, but a bit short is nylon drift punch. It is lightweight and might be just long enough to deal with majority of cases.

For really stuck ones you will need something stronger. Choose bronze rod that just a tad
smaller than caliber of you round. Having it too small and you are risking damaging barrel.

There are couple of options in this category. One popular retailer offers these rods for $29 or you can get similar rods for about 10 times cheaper from onlinemetals.com

And don’t even bother with one of these cheap plastic ones. They are not strong enough and will break first time you use it.

Choose wisely.