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SKU: 45B 275 XPB/20

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275 gr. BARNES XPB @ 2,000 fps/ME 2,442 ft lbs
20 Round Box

ITEM 45B 275 XPB


Written 03-2018

As of this writing (03-2018) we’ve been getting requests to make some heavy duty 450 Bushmaster loads since the cartridge was introduced around 10 years ago.

This is a cartridge that will hammer North American big game species, mostly because of its caliber. We are making four loads (which are all-purpose designed) to cover your hunting needs from smallish whitetails to bull elk, grizzly, and moose. If you know your range and understand your bullet drop, there is no reason not to use this cartridge out to 250+ yards.

These are our four current (we may add more at some time) 45 Bush loads and their projected velocities. We will post real world velocities obtained from our test guns with each load.

1.  Item 45B 250 JHP -- 2,250 fps
2.  Item 45B 275 XPB -- 2,000 fps
3.  Item 45B 300 JHP -- 1,950 fps
4.  Item 45B 360 HC -- 1,750 fps

As each new load becomes available, we will write a short tech article about its intended uses and limitations.

With regards to Item 45B 275 XPB, This load is very versatile. Due to the expansion characteristics of the Barnes XPB bullet, This load will give the velocity of a 275gr. bullet, but the penetration of a much heavier typical lead-based bullet. This bullet will work well on small animals like whitetail and still work on bigger animals like moose or elk. Even at close range, this bullet will not disintegrate if large bones are hit. Typically, expect penetration of between two feet and up to 4 feet, depending on impact velocity and which bones, if any are hit. If I wanted one load to do everything, this would be my load of choice. There are better deer loads (see item 45B 250 JHP) and better protection loads against dangerous game over 1,000 lbs., but for a “do-all” load, it would be impossible to beat this one.

You can see my posted velocities below in real world, over-the-counter firearms, for item # 45B 275 XPB.

➤  2,008 fps - Ruger All American 16-inch
➤  2,027 fps - APF AR15 16-inch


Item 45B 275 XPB - Exterior Ballistics Charts for several Muzzle Velocities


Muzzle Velocity @ 2500 fps for Item 45B 275 XPB



Muzzle Velocity @ 2400 fps for Item 45B 275 XPB


Muzzle Velocity @ 2300 fps for Item 45B 275 XPB



Muzzle Velocity @ 2200 fps for Item 45B 275 XPB



Muzzle Velocity @ 2100 fps for Item 45B 275 XPB


Muzzle Velocity @ 2000 fps for Item 45B 275 XPB


Muzzle Velocity @ 1900 fps for Item 45B 275 XPB


Muzzle Velocity @ 1800 fps for Item 45B 275 XPB


Muzzle Velocity @ 1700 fps for Item 45B 275 XPB


Muzzle Velocity @ 1600 fps for Item 45B 275 XPB


Muzzle Velocity @ 1500 fps for Item 45B 275 XPB


Field Proven rifle and gun ammo. Maximum firepower ammo. Best ammunition for rifles and guns for sale. Buffalo Bore. Strictly big bore. Strictly Business.

You must be 18 or older to order ammunition. Ammunition must ship UPS ground. Due to Department of Transportation regulations, we cannot accept returns on Ammunition. Make sure to use the correct ammunition in your gun. Check local laws before ordering.

IVAN on 10/16/2019 09:09am

Good evening. I thought you'd like to know that I killed a 240-pound boar with one round of item 45B 275 XPB from 100 yards away with Ruger Gunsite Scout rifle. The boar was broadside. I aimed and hit him just behind the right shoulder. The boar dropped on the spot and died almost immediately. It bled from the mouth and nose. We recovered the bullet. It went straight through and almost exited the left side behind the shoulder. The bullet came to rest just inside his skin on his left side. I think it worked perfectly. Here is a picture of Andrea with the boar at the processor.



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Friends and Customers, 08-18-20


All shooters are being inconvenienced with what is happening to our society and the rush it is causing on ammo supplies. We have LOTS of ammo in stock and are making more at a huge volume on a daily basis. If our web site allows you to order any item, that means it is in stock—WE DO NOT TAKE ORDERS FOR ITEMS WE DO NOT HAVE! So, please do not email and ask if items are in stock. If they aren’t, the shopping cart will not take your order.

We have hundreds of customers to get orders to on a daily basis. In order for us to accomplish this for our customers, we ask the following.

  1. Be sure of what you are ordering. You are going to get what you ordered.

  2. Do not contact us and ask to change an order you’ve already placed. When we manually change orders it requires a lot of time that we do not have during this rush and it keeps us from serving all of our customers. If you’d like to change an order, we can no longer do that till things slow down, so simply place another order for more product, but PLEASE, NO MORE CHANGES after the fact!

  3. We NEVER have and never will take ammo exchanges or returns and then turn around and re-sale that ammo to unsuspecting customers as factory new ammo—this is not safe nor is it fair to customers who are buying what they think is new and safe ammo. No ammo is tamper proof! So please stop asking to exchange or get a refund for ammo you ordered, but have changed your mind about.

  4. Please do not contact us and ask for tracking numbers or “when will my ammo ship”? Our system automatically emails out tracking numbers on the orders we ship each day, however, because these emails are coming from a corporation shopping cart, many of these emails may go to your spam folder……..please look there. If it is not in your spam folder, that means we have not yet shipped. At current order rates, we are shipping within 5-7 business days of the time an internet order is placed. Please sit tight. Your ammo will arrive at the same time if you track it or not and will certainly arrive later if we are swamped answering questions instead of getting orders shipped. When 30-50 people per day send emails asking for tracking information and we have to pull that information up, then type it out and email it, it takes a huge portion of our work day that we should be using to ship those orders to customers in need. Please leave us alone so we can serve all of you. (ship to you) It’s a bit selfish, during times of shortages, when so many folks need to protect their families, to slow us down because you ordered carelessly or want to change your order. Right now, we expect you to do your part to help us all get the ammo we need in our troubled country.

These measures are hopefully temporary and will not be needed for long as we enjoy the interaction with our customers, so please, for the time being, be mindful of all those others who are also trying to get ammo during what I think is a societal meltdown/emergency. Hopefully, we can serve you all. We want you and your families to be armed and safe and we wish you the best during these trying times. My biggest concern is that things will worsen yet more, for a while. Until things straighten out in our government and society, we will have to streamline our customer service in order to serve all customers. Thank you for your understanding.

Good shooting and God bless,

Tim Sundles

I Understand