I’ve created a calculator that computes reduced NRA High Power target dimensions so that you can create your own SR, SR-3, MR-1 and other targets to match your distance and caliber:
To draw the targets you will need a vector graphics program like Corel Draw. They have a home and student version available here:
https://www.coreldraw.com/en/product/home-student/
Here’s an example of a target I created for shooting offhand at the SR 200 yard target at our local 25 yard indoor range:
The target is made to be printed on tabloid sized 11×17 paper. The HP 7740 wide format printer for around $180 can’t be beat and has printed many of these targets for me.