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Understanding "Bonded" Bullets -- Dispelling the Myth

Understanding “Bonded” Bullets—Dispelling the Myth

There are several different processes of electro and/or electro chemical bonding of the bullet jacket to its core, but we will not discuss those processes here, other than to state that such processes are used to bond a bullets jacket to its core material.

Just because a bullet was manufactured via one of the “bonding” processes, does not magically make that bullet better than a normal “cup & core” pressed bullet for any and all purposes—not even close. I often get emails (which is why I am writing this article) from customers who want a bonded bullet for this or that application and only a bonded bullet will do, which means they lack understanding.

If bullet construction (i.e. hardness, malleability, etc.) is properly designed for a range of impact velocities into a range of known mediums, (flesh, bones, guts, etc) it matters little that the core material is bonded to the jacket. As an example, the Speer Gold Dot 90 grain .355 inch dia., (380 Auto bullet) bullet is “bonded” as are all Gold Dot bullets. The same diameter 90gr. JHP bullet made by Sierra is standard cup and core swaged/pressed construction, but when we fire either bullet into ballistic gelatin at the velocity ranges of our 380 Auto +P or “Standard Pressure” ammo, those two bullets act nearly identically. This happens because even though they are made by different manufacturing processes, they are both utilizing materials that match the expected impact speeds with the expected mediums. The shooter gains no advantage by using the bonded bullet over the cup & core bullet IN THIS PARTICULAR EXAMPLE and the medium (probably a human) receives no more damage with one projectile over the other, within the expected velocity range. Yet people who do not know any better, simply insist on having that magic “bonded” bullet………….

Another example would be the Sierra 180gr. Spitzer flat base .308 bullet when fired from an 06. I have killed or seen killed dozens of black bear, deer, hogs, elk, etc. with this bullet at impact speeds of 2750 fps to 2100 fps and within that velocity range on medium to large game animals, the bullet never fragments or “fails” in any way. It simply mushrooms nicely, holds together and penetrates deeply enough that I have never recovered one from a black bear shot at any angle. I could not ask for better performance from a big game bullet, whether it is “bonded”, partitioned, or sprinkled with Holy Water. Yet this Sierra bullet is an old technology, cup & core bullet. The added benefit of this bullet is that it is cheap to purchase, which means I get to shoot a lot of them without going broke and lots of shooting at lots of targets, is a very good thing.  However, when this same Sierra bullet is fired from one of the various 300 magnums at a muzzle velocity of 3100 fps and the impact distance is close enough that the bullet is exceeding 2750 fps when it hits a game animal, the bullet will SOMETIMES rupture and fragment and therefore not penetrate as deeply as may be desired in SOME cases on a large animal such as elk, but on a smaller deer, it does not matter if the bullet ruptures as a thin bodied deer does not require much penetration to be killed. A “bonded” bullet will also come apart in degrees if the impact velocity is greater than the material of the bullet is designed to withstand for the medium it strikes.

In short, ANY bullet, regardless of “bonding” (bonding of any type) or partitioning or any other type of construction, must be made of the right combination of materials to withstand the range of impact velocities into the range of mediums you are going to shoot. “Bonding” is just one tool, that if properly matched with other criteria, gives some useful options to bullet construction, but standing alone, in-and-of itself, “bonding” means very little.

Mor information on this subject can be found in my article on Bullet Jacket/Core Separation.

Friends and Customers, 08-18-20

IF YOU DO NOT READ THIS, IT IS ON YOU!

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