van25
I do not think it is necessary to use I shot card... I just have more confidence in the use of one than I do without one...
I use the card for a couple of reasons... 1. T7 burns so hat and to move that heavy of a projectile out the barrel the heat and pressure would really be tough on the bottom of a pure lead bullet - to the point that I feel it might melt and cast of some molten lead... so the card acts as an insulator and as a bitof a shock cushion. 2.the card also gives me some comfort in thefact that it will stop the bullet lube from contaminating the powder on warm days - and I am one of those that leave the gun loaded for days or weeks at a time. 3. the card wipes the bore on the way down and helps remove some of the fouling...
A lot of people shoot without the card, but for me it adds a feeling of more confidence... & security