Should I use these high ends golf balls?

A friend of mine who is a personal trainer to several semi-pro and pro golfers gave me a shag

bag that one of them was discarding when he left for Japan. It contains several lightly used

balls.

I normally use Titleist DT Solo.

In the bag are :

Titleist Pro V1X

Callaway Chrome + and Diabalo

Last time I was on a launch monitor my swing speed was in the high 70s.

Try them out on par 3s and see if you like / benefit from the spin around the greens. Otherwise shelve them until you feel like your game can benefit from them. But I love those soft cover balls for second shot onwards. I just do my best to not lose them on tee shots since they may spin a bit more / you care if you lose one in the woods. Last thing: the Diablo, if memory serves, is the "one of these thing is not like the others". It's a distance ball akin to the Titleists NXT, I think. The Diablo Tour was a pretty good ball though. It'd be the one I think you'd find most similar to the Solo.

lol, that sounds like me.

I don't buy balls, I find more than I lose and play those.  I probably have a 100 ball surplus, running out of Bridgestone E-6's though.  Maybe I'll start working through the Titleist's next.

Well I used the Titleist ProV1x on the par 3s. It did not make a difference. I parred one, bogeyed two, and double bogied the other. But I

had fun. See detail on my swing thread.

It's not the ball in this stage of my improvement just like some of you said.

Like you, Solos are my bread and butter ball. I like ProV's ok and would play them if they were free. I don't think they would help or hurt your game.  I think the Diablo might have a harder feel than the Solo.

The good thing about ProV's is when you get good enough that you know the difference, you don't lose as many, LOL!

If someone gave me a bag of lighly used ProV's, I would play them.