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45 Colt (Long Colt) +P 300 Grain XTP Jacketed Hollow Point

1.30 LBS

Product Description

These loads are safe in all large frame Ruger revolvers, TC Contender, Colt Anaconda, and Freedom Arms firearms. These loads are safe in all modern Model 1892 leverguns as well as all Winchester & Marlin 1894's. DO NOT USE IN ANY OTHER FIREARM. THESE ARE NOT STANDARD PRESSURE CARTRIDGES! Do not use +P ammunition in firearms that are replicas of early designs, such as rolling blocks, Sharps and Colt-style single action army revolvers.

Underwood Ammo’s XTP rounds are notable for their power and accuracy. We utilize Hornady’s eXtreme Terminal Performance (XTP) bullets which are designed for deep terminal penetration, great accuracy and controlled expansion. We combine Hornady’s unparalleled XTP bullets with our own carefully formulated design which results in one lethal round.

As with all of Underwood Ammo’s rounds, we utilize flash suppressed powder so that your vision will not be compromised if it becomes necessary to use your firearm in low light.

While taking advantage of our state of the art testing equipment, this high performance ammunition is field tested using popular, real firearms that our customers are most likely to own out in the real world with all the elements you would experience. If for some reason Underwood Ammunition fails to meet performance expectations, we stand by our product 100% and will make sure the customer is satisfied with every purchase.

This ammunition is new production, non-corrosive, in boxer primed, reloadable brass cases.

Technical Information

  • Caliber: 45 Colt (Long Colt) 
  • Bullet Weight: 300 Grains
  • Bullet Style: Jacketed Hollow Point
  • Case Type: Brass

Ballistics Information:

  • Muzzle Velocity: 1300 fps
  • Muzzle Energy: 1126 ft. lbs.


Product Reviews

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  1. One Shot, One Kill 5 Star Review

    Posted by on 22nd Nov 2016

    Used these 300 XTP's to bag my first deer with a handgun, large doe at 26 yards with my Ruger Bisley 5.5" barrel. She traveled approximately 5 yards after the shot and fell over. Bullet entered rib cage and exited through opposite shoulder. Couldn't be happier with the results. Blood trail was excellent, but not needed. :)

  2. Like I loaded it myself 5 Star Review

    Posted by on 27th Mar 2016

    Should be a good Whitetail round, acceptably accurate to about 80 yards from my 7 1/2" Blackhawk

  3. underwood 45 colt 5 Star Review

    Posted by on 16th Mar 2016


  4. Great ammo; great price. 5 Star Review

    Posted by on 14th Nov 2015

    Ordered 100 and have only shot 20 so far. I wanted to try them during Michigan's deer season which starts tomorrow. Good that my order arrived so quickly; had time to check my sights, and run a few over the ShootingChony. 1264fps from 6½" Super Blackhawk (454) and 1533 from the 16" Rossi. That's pretty close to the 300XTP from a full-power Casull loading. So yeah...a 45Colt load that (from a longer barrel) competes well with my best .454 loads.
    I like that!

  5. powerful ammo 5 Star Review

    Posted by on 12th Oct 2015

    This is very powerful, but very manageable in my new Ruger 4.2 inch Redhawk! Just awesome ammo. Underwood is the best...ordered at midnight on a Monday and received it on Wednesday morning! I use Underwood in .380acp, 9mm, and 45Colt and plan to get 45acp soon.

  6. Best hunt load for 45 colt 5 Star Review

    Posted by on 29th Apr 2015

    For dangerous game go with the hard cast and between the two; you've got your 45 colt needs covered.

  7. Hard hitting packs a punch 5 Star Review

    Posted by on 7th Feb 2015

    Theswe are reliable and consitent. They do pack a punch. My self-defense Bear Round for Alaska!

  8. Big Time power For The 45 Colt 5 Star Review

    Posted by on 7th Feb 2015

    This is an extremely effective load for large game up to and including buffalo. A flat point hard cast gives excellent penetration and wound channels that stop large game quickly. A very accurate load in my revolver.

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