A list of handy online resources for the firearms enthusiast

Posted May 1, 2014 by muzzlevelocity in Ammunition

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The internet is vast. Type any term or combination of terms into a search engine and you’re bound to see tens of thousands, if not millions, of results, most of which are thoroughly irrelevant. This truth applies to firearms related searches as much as anything else.  In an attempt to reduce online search times for busy firearms enthusiasts, Muzzle Blast has compiled the following brief list of helpful online firearms resources.

Ballistics by the Inch

It is a widely known fact that the length of a firearm’s barrel greatly influences the velocity at which a bullet will leave the muzzle. What is harder to determine is exactly how much of an effect increasing or reducing barrel length has on muzzle velocity.

The crew at Ballistics by the Inch has put a tremendous amount of work into acquiring data that maps the relationship between barrel length and velocity. Currently, Ballistics by the Inch has data for 23 different cartridges listed on its website.

Handloads.com Ballistic Calculators

Handloads.com offers a variety of calculators that allow a visitor to calculate a bullet’s velocity, kinetic energy, and trajectory at a variety of distances. There are also calculators on the site for free recoil energy, and Taylor Knockout Theory.

Berger Bullets Twist Rate Stability Calculator

The accuracy of a given bullet out of a firearm is due in part to the twist rate (in revolutions per inch) of a firearm’s rifling. In general, heavy for caliber bullets need a fast twist rate to stabilize due to their increased length while lighter bullets are typically accurate from barrels with a slow twist rate.

The Berger twist rate calculator allows the user to input known data (such as twist rate, muzzle velocity, bullet weight, and bullet length) in order to estimate if a given bullet will stabilize from a given firearm.

JMB Ballistics bullet length database

In order for the above twist rate calculator to work, the length of the bullet in question must be input. Where can one find the lengths of a variety of different bullets without visiting each manufacturer’s website? Over at the JMB Ballistics page, that’s where. The database lists the lengths of hundreds of different bullets across all diameters and manufacturers.


At the time of this article’s posting, the ammunition market is still tight following the panic buying that occurred in the wake of the Sandyhook tragedy. It is still common to see bare ammo shelves at local gun shops and big box stores as well as the dreaded “out of stock, no backorder” text listed over and over on online retail sites.  Ammoseek is an online search engine devoted solely to ammo. If the ammo you need is available for sale anywhere on the internet, the search engine will tell you in seconds.

Keep checking back to this page as it will be updated as we discover additional useful online gun resources.

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