“AVG 28″ ft/sec” and “AVG 16.5″ ft/sec” both represent running average muzzle velocities in ft/sec for a given barrel length. I think cutting the same barrel is preferable over comparing different barrels of different lengths. Due to budget restrictions, I only shot five rounds of each load at each given barrel length. This test controlled for the barrel, which, in my opinion, is better than comparing velocities between different rifles with different barrel lengths. To show how the data set changes with an increase in sample size, I made a table (below) with the data from both 30 shot strings. Discussion in 'Rifle Country' started by chains1240, Dec 15, 2010. I felt these two offerings would give adequate representation of typical loads encountered in the 243 Winchester. Been noticing this 6C deal and that Ruger's precision rifle will have this caliber over .243. Choice of calibers. My lathe is a two hour round trip to the range. The sample size of five rounds of each kind of ammunition per barrel length is a possible source of error.

I have a 7mm08 barrel from them. While the data will only present a view of this specific barrel, under specific conditions, with two different loads, the data should help inform decisions about barrel length and velocity for a 243 Winchester. Like the title says, who makes 243 WIN barrels for a DPMS pattern AR? Midwayusa sells Shilens with a headspaced bolt, "Peace has cost you your strength and victory has defeated you!". Copyright © 1996-2020 AR15.COM LLC. Average velocity reduction was 42.3 feet/second per inch of barrel length. The “shot” column represents the shot number in the respective string. B2-L004-C000. I own a Howa 1500 in .308. In this post, a continuation of Rifleshooter.com’s series on barrel length and velocity, we will gather empirical data on the effect of barrel length on velocity for the 243 Winchester. Post was not sent - check your email addresses! .243 rifle for sale and auction. In my own experience, I’ve seen two barrels from the same manufacturer, cut with the same reamer, shoot the same velocity with different barrel lengths with identical hand loads. It shot fine, totally reliable, quite accurate. I haven’t encountered any magazine related problems with it in various different firearms. Sort By. 0. Overbore cartridges tend to be characterized by high muzzle velocities, use of slower burning powders, longer barrels and relatively short barrel life due to throat erosion.

Sell your .243 rifle for FREE today on GunsAmerica! A quick note on range conditions. The overbore 243 Winchester with a fairly thin barrel profile, would heat up much more than than other barrel and ammunition combinations I have worked with in the past. Something on the cheap side, and readily available would be best. 6.5 Creedmoor- Effect of Barrel Length on Velocity: Cutting up a Creedmoor! This is notable when comparing velocity figures. Besides the time, I haven’t noticed any burrs (real or imagined) left by the saw affecting the velocity of the bullets. April 19, 2016 Shot Show Cancelled - TNVC & NGI Present vSHOTT 2021 with TNV PVS-14 Givewaway! AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. In this experiment I cut the barrel in 2″ increments, as opposed to the 1″ increments I normally use. It was actually borrowed from another project, a Remington 700 chambered in 7.62x39mm Russian.

Savage 12 LR Precision Target Series,Bolt Action,.243 Winchester,26" Ultra-Heavy Barrel, 3+1 Rounds Buyer's Club $1,016.49 Non-Member $1,069.99 5 out of 5 star rating (1 reviews ) “AVG change ft/sec per inch” represents the average loss of velocity per inch based on the running averages. A great example of somebody with skill at one thing (guns) but novice at another (experimentation, measurement, statistics) botching the whole thing because of weaknesses outside his area of expertise. 300 Winchester Magnum: How Does Barrel Length Change Velocity- A 16″ 300 Win Mag? This was decision was made based on the very thin diameter of the barrel. He should have consulted somebody. However, in an AR platform I didn't find it to do much more than the 20" .308. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. Although The High Road has attempted to provide accurate information on the forum, The High Road assumes no responsibility for the accuracy of the information. [Last Edit: 1/4/2017 10:11:57 AM EST by stooxie], [Last Edit: 1/7/2017 2:05:08 PM EST by ARTNC10], [Last Edit: 1/7/2017 2:17:30 PM EST by borderpatrol]. All information is provided "as is" with all faults without warranty of any kind, either express or implied. Buy a .243 rifle online. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. The rifle was then cleared, and 2″ was cut off the barrel using a cold saw. Just looked at the new CDNN catalog. It is easy and free! A quick note on range conditions. per page.243 Winchester 20" Barrel, Rifle Length, Heavy Contour . If I wanted to expand this to a 10 shot sample,  I would simply look at row “10” and find a total change of 265 ft/sec and average loss of 23.0 ft/sec per inch of barrel.
Very accurate. Even barrel life from some who have some higher round counts are recording similar short barrel life compared to the .243.

Well, Newtonian physics must be able to skip calibers. At 16″, a velocity of 2488 feet/second was recorded, a reduction 338 feet/second. After reading what I could I find about the 6C ballistics, I'm not seeing the big difference here.

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