Almost two year ago, I had started training my grip strength using grippers. At first I've used a cheap wooden gripper of unknown strength (though I think it's less than 50 lb).
I trained on it for few months and became proficient in closing it. Then I bought one of those plastic gripper with rubber. It's an adjustable one with 10 to 40 kg resistance (22 - 88lb)
And finally, I recently bought this professional looking metal gripper of 150 lb resistance. I've been training on this for few months and can do three sets on each hand with 50 reps per set. I'm still unable to close it 100% so I will work on this for a month or two more.
So, here's is my question: What should be my next gripper level? 200 lb seems too low and 250 lb one isn't available in my location. Do you think I can train with a 300 lb gripper? Or should I just play it safe and buy a 200 lb one?