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Yes that looks like Rohn 25 to me too.
I'd drill the holes 1/16" bigger and install the next size larger bolts one bolt at a time. Make sure that your new bolts are high strength. Do not use standard grade 2 steel.
The original problem was due to the bolts installed loosely.
The tower will end up at 90-95 percent of the original strength so your tower location, wind zone and antenna loading should be reviewed. Perhaps you can install a house bracket.
To make the tower stronger you would clamshell the tower leg joint with a half round pipe one size larger than the existing leg and add extra bolt holes above and below the existing bolts. This would be in addition to larger bolts in the existing holes.
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