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VELOCITY VERSUS BARREL LENGTH

VELOCITY VERSUS BARREL LENGTH

Barrel length is not a stand-alone determiner of velocities and therefore energies. Factors such as barrel/cylinder gap, (in revolvers) chamber dimensions, chamber throats, (in revolvers) barrel throats, rifling depth and dimensions, rifling style or type, barrel material, bullet material and powder burn rate, etc., all have an impact on velocity achieved.

The above factors may far supersede the effects that barrel length alone has on velocity developed when firing any given load from any given firearm. Barrel length can only be meaningful in determining velocities if all else is always equal and the truth is “all else” is seldom, if ever equal.

As a few real world examples; I have two Marlin rifles chambered in 35 Remington. One has an 18 inch barrel and the other has a 22 inch barrel and yes the 18 inch barrel gives higher velocities with every type of ammo I’ve tested. I have two Marlin rifles chambered in 45 Colt. One has a 20 inch barrel and the other has a 24 inch barrel…………the 20 incher shoots faster with every type of ammo tested. Colt used to make the famed Python model, chambered in 357 Remington Magnum, but every Python I ever tested, produced substantially slower velocities than most other makes and models of revolvers, with like barrel lengths! Why? Colt made the python with a choked barrel to enhance accuracy. What I mean by choked is that the bore of the barrel was tapered, starting at the rifled end of the forcing cone/throat and was .001 inch smaller at the muzzle. Yes this typically enhanced accuracy, but caused the Python to generate roughly 100 to 150 fps less velocity, with a 6 inch barrel, than most other makes of revolvers, if all (or most) else was equal……. This “Python” situation is a perfect example of how barrel internals can determine velocity to a greater degree than barrel length.

Often, customers want to know “what velocity” they will get with one of our loads out of their 24 inch wiz bang (insert any brand of rifle or handgun). I am not comfortable with giving meaningless answers to satisfy a customer, based on assumptions, as I truly desire to be helpful to our customers. Hence, this short article to explain the dynamics of how unknown barrel internals affect velocity generated from all barrels. This may also be a good time to read my article entitled “HOW WILL THIS AMMO FEED AND FUNCTION IN MY GUN”.

In short, the only way to really know what velocity a given load will develop in a given firearm is to fire that load, from that firearm, through a chronograph that is properly working and properly set-up…….Oh yes, I have seen lot of improperly set-up chronographs, which results in folks getting misleading numbers.

Far too often, we humans are using generalizations in dealing with firearms. If we want exacting results, in any endeavor, we have to use exacting means. It takes time, knowledge and money to do things correctly in any pursuit. Exacting firearms usage is no different. If you want to know what velocities your firearm is generating with any given ammo badly enough, you’ll end up going to the expense of investing in a quality chronograph. I have three Oehler chronographs. I bought my first one in 1985. I’m certain the various Oehler models are not the only good chronograph on the market, but my results with Oehler have been very good, so I’ve never seen a reason to change. Hopefully this short article can be of some usefulness to our customers. Good shooting and God bless.

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