Random Skips

Len, Does it happen when there is heavy bass? Does it happen when you are playing quietly or only at high volume? I can't believe a Rega cartridge would be incompatible with their own turntable but you could have a defective cartridge. If the cartridge is too stiff for the mass of the tonearm (low compliance) the tonearm will pop out of the groove with the right bass note. Other possibilities are, your anti skate mechanism is sticking, your tonearm is running into the cuing device, your tone arm bearings are defective, your turntable just hates you. Also, make sure the table is perfectly level and the cartridge is aligned correctly. 
To check for a defective cartridge you will need a test record with resonance test tracks. Defeat the anti skate device and see if the skipping stops. 

Good luck
Mike    

glenn, the nih article was written for people who do not have a medical background and was done very nicely with pictures of hair cells and all but it is still very simplistic and omits the more complicated aspects of human hearing. Most people can listen to music safely at 95 dB as long as they warm their ears up first and get their stapedius muscles tightened up. Some people are more susceptible to hearing damage not only from noise but also certain drugs. The most dangerous noises are high volume impulse noise like gun shots and repetitive loud short duration noise like you would get from repetitive use of a hand held circular saw. In both instances your ears do not have a chance to accommodate to loud noise mode. In quiet environments your hearing sensitivity automatically increases so that you can hear faint sounds in the environment like that lioness sneaking up on you. It takes your ears a minute or two to get into loud noise mode which is why you always warm up your ears at lower volumes increasing a few dB at at time till you get to your preferred listening volume. Music at 95 dB is safe for most people. The problem is that it is hard to tell who is going to be more susceptible to hearing damage like Beethoven. The best indicator is family history. If both your parents where deaf as a door knob by 80 I would worry. Everybody should always wear hearing protection when shooting or using just about any machine tool. Not doing so is asking for it. For us music lovers there is a great product, the Etymotic  ear buds. They have a 32 dB attenuation rate and they sound better than 90% of the ear buds out there. When in the shop or mowing the lawn I'm in my own little world listening to Rage Against the Machine. You could set off an A bomb behind me and I would not hear it. Perfect.  https://www.etymotic.com/consumer/earphones.html
I use the ER 2XR plugs for hearing protection.

Mike

cleeds, I am a board certified family physician. I practice in southern New Hampshire. You can check my reviews out on the internet.