Buy what you want. Its not gonna bottleneck it heck a core 2 duo wont technicallg bottleneck it. Ylu may not see the sMe fps but that is not bottlenecik
People see you type AMD and automatically type "Bottleneck". Your Ryzen 1300 will be fine, and the AM4 platform will allow you to upgrade significantly if you ever feel the need. The 1300 is an awesome path into a sweet AM4 machine if you're on a budget. You will enjoy it.
I have a portable system I bring with me with a 1300x and a 1060 6gb and it seems fine. Honestly couldn't tell you because compared to my rig at home it's way lower spec
You can clearly see the CPU usage randomly spike here. Doesn't appear to have an effect on the video but when you're actually used to playing on a more capable CPU, the gameplay feels stuttery no matter what framerate you're at with any 4 threaded CPU.
Bottleneck is more of software oriented rather than just crude assumptions, list all software or game that you wanna play, and see what resources it needs most. Does it require a lot of cpu power or gpu
Depends whether you're after high fps/hz or high resolution.
I game at 4k 60fps, so processor isn't being taxed all that much, hence why I'm getting away with running a Ryzen 3 1200 with a GTX1080ti.
If you want to game at 144hz, you will need a MUCH stronger processor... and for 220hz, even more so