Powder data

mp40 · December 2, 2013, 10:18 PM

What size barrel is most of the powder data for hodgdon ,ramshot , horandy ecet. Used ? How much difference 4 in to 5 in is there?

Adamantium · December 2, 2013, 10:24 PM

For Hodgdon and Alliant, click on the print button and the pop-up will show you the barrel length used. For Ramshot they will list it at the start of the cartridge info.

For how much calibers are affected by barrel length, check out this website. http://www.ballisticsbytheinch.com/calibers.html

mmb713 · December 2, 2013, 10:30 PM

Depends on the cartridge what barrel length they use to test. 9mm usually four to five inches. 7mm Remington Magnum usually 24 inches. They usually will list their test barrel length with their data.

One inch of barrel length may give you an extra 50 fps, maybe not though. Some barrels shoot faster than others and some powders will give more velocity gains with a longer barrel than others. I doubt anything you shoot will be able to tell the difference.

Clark · December 4, 2013, 11:50 AM

Quickload is great for playing "what if?" with barrel length.

It would be illegal for me to shoot a 10" 7mmRemMag, but I can computer simulate it in a few seconds and get the velocity.

For bottle neck cartridges and canister powder, it is common for Quickload to predict a velocity centered in the string I measure with my chronograph.

December 2, 2013, 10:18 PM	#1
mp40 Member Join Date: December 1, 2013 Posts: 26	Powder data What size barrel is most of the powder data for hodgdon ,ramshot , horandy ecet. Used ? How much difference 4 in to 5 in is there?

December 2, 2013, 10:24 PM	#2
Adamantium Senior Member Join Date: June 6, 1999 Location: El Paso, TX Posts: 1,021	For Hodgdon and Alliant, click on the print button and the pop-up will show you the barrel length used. For Ramshot they will list it at the start of the cartridge info. For how much calibers are affected by barrel length, check out this website. http://www.ballisticsbytheinch.com/calibers.html __________________ New gun, same ol' shot.

December 4, 2013, 11:50 AM	#4
Clark Senior Member Join Date: December 4, 1999 Location: WA, the ever blue state Posts: 4,678	Quickload is great for playing "what if?" with barrel length. It would be illegal for me to shoot a 10" 7mmRemMag, but I can computer simulate it in a few seconds and get the velocity. For bottle neck cartridges and canister powder, it is common for Quickload to predict a velocity centered in the string I measure with my chronograph. __________________ The word 'forum" does not mean "not criticizing books." "Ad hominem fallacy" is not the same as point by point criticism of books. If you bought the book, and believe it all, it may FEEL like an ad hominem attack, but you might strive to accept other points of view may exist. Are we a nation of competing ideas, or a nation of forced conformity of thought?

December 2, 2013, 10:30 PM	#3
mmb713 Senior Member Join Date: March 15, 2011 Location: Salt Lake City, UT Posts: 421	Depends on the cartridge what barrel length they use to test. 9mm usually four to five inches. 7mm Remington Magnum usually 24 inches. They usually will list their test barrel length with their data. One inch of barrel length may give you an extra 50 fps, maybe not though. Some barrels shoot faster than others and some powders will give more velocity gains with a longer barrel than others. I doubt anything you shoot will be able to tell the difference.