Rolling over my 401k to Palladium, checking tax stuff

• •Okay, so I'm finally pulling the trigger on rolling over a decent chunk of my old 401k into a Precious Metals IRA, specifically leaning Palladium.
• •I've got about 150k in an old 401k that's just sitting there, not doing much good for my peace of mind.
• •My big concern is really just the tax implications.

Okay, so I'm finally pulling the trigger on rolling over a decent chunk of my old 401k into a Precious Metals IRA, specifically leaning Palladium. Been a contractor for years, based here in Jacksonville, and while the military industrial complex keeps me busy, I'm always looking for ways to secure my own future, especially with all the global uncertainty. I've got about 150k in an old 401k that's just sitting there, not doing much good for my peace of mind. I'm obviously going for the direct rollover to avoid any issues, but I'm just looking for some reassurance or warnings from anyone who's been through this process.

My big concern is really just the tax implications. I've read up on the 60-day rule, and how direct rollovers bypass the immediate tax hit and the 10% penalty for early withdrawal. But are there any sneaky little traps I should be aware of? Like, is there anything special about rolling into a Palladium IRA versus, say, a Gold IRA that could trip me up with the IRS down the line? I'm picturing some obscure rule about "collectible" metals and higher tax rates, even though I know it's a tax-advantaged account.

I’m also contemplating putting some into silver too. I was just checking out this "Silver vs Stocks" tool at https://silvervsstocks.goldirablueprint.com/?period=10Y and it's pretty eye-opening to see the long-term performance. It really makes a strong case for diversifying beyond just stocks, especially with how volatile everything seems these days. But again, any different tax rules for silver in an IRA?

My financial advisor said everything should be straightforward, but I'm a security-minded guy, and when it comes to my money, I trust verification more than just a single source. Anyone had any unexpected tax bills or complications after rolling over a 401k to a Precious Metals IRA, especially with palladium or silver? Just trying to dot all my 'i's and cross all my 't's before I make this move. I want this to be a smooth transfer, not a headache come tax season.