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Louisville Slugger Prime 919 Review: Is The 919 The Best Slugger?

In 2019, Louisville Slugger continues to push the envelope with the Prime 919.

Louisville surprised the market last year when they didn’t offer the 918 in a USA format.

The company fixed that this year, and their key addition is adding a USA model.

That means you can find the 919 in BBCOR, USA, and USSSA formats this year.


The Prime 919 offers some consistency across all of its models.

You’ll find that all of the bats offer a composite barrel that features a MicroForm design.

MicroForm is designed to offer a lighter swing weight which should increase swing power and pop.

Each model also comes with Louisville’s VCX technology which allows for a little more movement between the barrel and the handle of the bat.

There is some debate as to whether this offers significant benefit or not.

The beauty of the VCX is that it decreases vibrations and makes bad hits a little more tolerable.

The downside is that you lose some power as there is less of a trampoline effect in these models.

You’ll also find that Louisville is using a new grip tape across the board.

Generally speaking, I don’t think that the grip tape is going to make a significant difference in this bat.

The rumor is that Louisville wasn’t able to renew the contract with Lizard Skin, so they opted to develop their own tape this year.

Louisville is trying to accommodate as many hitters as possible this year. You’ll find that each model offers a variety of sizes.

The size of the bats changes the moment of inertia ratings.

This helps understand whether you have a control/speed design (registering at lowest, 540) or a distance/power design (registering at highest, 1200).

For the Prime 919, you can expect the lighter bats to fall in the 740-820 range while the heavier bats are about 915-1040.

Prime 919 BBCOR Baseball Bat

  • 3-piece composite
  • VCX connection
  • RTX end cap
  • LS Pro comfort grip
  • -3 ratio
  • Impressive variety of bat sizes
  • High price tag

The BBCOR model is a drop the (-3) model that comes in a variety of sizes.

You can find the BBCOR in a 31”/28, 32”/29, 33”/30, or a 34”/31.

Prime 919 (-3) 2 5/8″
2019 Louisville Slugger Prime 919 (-3) BBCOR Bat (WTLBBP919B3)

It may not seem like much, but that’s a great variety for a great number of hitters.

The 31- and 32-inch models are definitely directed toward hitters who want to place the ball, while the 33- and 34-inch models are designed for more power hitters.

The BBCOR also comes with the RTX end cap which is designed to maximize sweet spot. The RTX also allows for a better barrel design.

It’s not something that most people think about, but the RTX end cap also improves the sound of the bat when a hitter makes good contact.

BBCOR models are known for having a higher price tag than their USA and USSSA counterparts.

That being said, the Prime 919 may be a little high for my liking. It’s a great bat, but it comes with the price tag of around $450.

It’s going to be one of the best BBCOR bats this year, but I think you can find a better value elsewhere.

Prime 919 USSSA Baseball Bat

  • 3-piece composite with ADV MicroForm
  • VCX technology
  • Speed Ballistic Composite end cap
  • LS Pro comfort grip
  • -10 and -8
  • Very Impressive variety of bat sizes

The USSSA model of the Prime 919 is similar to the BBCOR in most aspects.

This senior league model includes -10 and -8 drops:

Prime 919 (-10) 2 3/4″
2019 Louisville Slugger Prime 919 (-10) Senior League Bat (WTLSLP919X10)
Prime 919 (-8) 2 3/4″
2019 Louisville Slugger Prime 919 (-8) Senior League Bat (WTLSLP919X8)

This really accounts for players of different sizes, allowing more players the opportunity to use the 919 this year.

The key difference is that this model has a Speed Ballistic Composite end cap.

That’s a fancy way of saying that the end cap is designed to maintain barrel shape while improving weight distribution.

The weight distribution makes this bat an easy swing and allows for better balance.

The USSSA model comes in at around $350. Like the BBCOR, I think that’s a bit high, but if you’re willing to pay that much for a bat, this offers great quality.

The Prime 919 is on our list as one of the best bats for senior league baseball this year.

Prime 919 USA Baseball Bat

  • 3-piece composite
  • VCX technology
  • RTX End cap
  • LS Pro comfort grip
  • -10 ratio
  • Very impressive variety in bat sizes

The most notable change in the USA model is that Louisville actually carries a USA model in 2019.

For some reason, in 2018, Louisville didn’t carry a USABats option. It’s something that a number of parents and players were upset with.

Young players had gotten used to Louisville products and weren’t able to continue with the brand because of the new regulations.

The USA model is another drop 10 (-10) option that you can find anywhere from 28 inches to 32 inches.

Prime 919 (-10) 2 5/8″
2019 Louisville Slugger Prime 919 (-10) USA Baseball Bat (WTLUBP919B10)

It’s designed with a balanced swing weight in mind.

Similar to the USSSA (senior league) and the BBCOR, you’ll find that this is a bit more likely to be used by average hitters because of the VCX.

You may see a trend starting, but I think that price tag for the USA model is a little steep.

Like the USSSA model, this is around $350.

I’m not a fan of that type of price, but you could argue that you get what you pay for.

To find the right bat for your budget, check our reviews for some of the best 2019 USA bats.

Prime 919 vs Prime 918

The Prime 919 is quite comparable to last year’s model.

The key differences are the 919’s have a VCX connection rather than the TRU3 connection that Louisville used last year.

This is supposed to decrease vibrations.

That’s great, but some say that they feel there is a small loss in power because of this.

It decreases the trampoline effect.

As mentioned above, it’s also important to note that the 919 has a USA model that the 918 didn’t have last year.

Louisville also has a new (self-created) grip tape this year.

They claim that the LS grip tape offers some cushion and that it molds itself around your grip better than the Lizard Skin tape did.

That’s something that we’ll have to keep an eye on.

For more in-depth comparison, read our Prime 918 review.

Comparable Bats

If you’re in the market for something similar to the 919, you should consider the CF Zen by DeMarini.

DeMarini is another great bat company that offers a great reputation. The bat is similar and so is the price tag.

You could also consider the Quatro Pro by Rawlings. It has some solid reviews and is comparable in price.

The USSSA model offers a significant discount compared to the 919.