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Optimum Barrel Length

Sako Collectors Club Discussion Forum

dl

Active Member
23" seems a bit long on my Finnfire, without wanting to upset the purists on here, how short could you go? If the twist rate is 1:16.5" would there be benefits from shortening it to this length?
 
My Finfire has a 15" barrel, it transforms the gun from an unwieldy beast into a very nice pointable gun. I read that 15" is the node point for the harmonics and so the best place to chop, but don't quote me on it.
The powder on rimmies is used up by 12" or so, 23" and heavy barrel is silly.
 
Test results vary a bit, but barrel friction of barrels longer than 16"-20" slows the .22 LR's muzzle velocity slightly. This can be good or bad, depending on what velocity you're looking for. The most accurate ammunition usually runs just below the speed of sound, thus preventing the bullet from breaking the sound barrier (and resulting shock wave) twice -- once as it accelerates and again as it's velocity drops below Mach I.

Shorter barrels result in more muzzle blast. A barrel as short as 15" is quite a bit louder, even in a .22 LR, than a longer barrel. I personally like a rimfire barrel to be in the 18-20" range, but everyone has his own ideas. In the U.S. federal law prohibits rifle barrels shorter than 16".
 
I shoot 16inch / 41 cm with a cmm4 silencer on my P72 .22LR (heavy barrel sporter)
I generally shoot premium grade ammo when seeking outmost performance. Good batches of Teenex from Eley, M midas from Lapua that I collect. I like the supersonic Velocitor when flatter trajectory is usefull ( to about 100m) along with a rangefinder when hunting larger birds. Too bad those rounds dont`t come without hollowp. cause they make instant pigeon soup -too bad.
Good batches of Eley Practice are good and great for plinking, but occasional flyers can ruin MOA at 50m aaswell as at 100m when mother nature is kind.
For long range shooting 100 - 300m. I prefer Teenex and some 20 year old Lapuas. Yes it is possible with an angled long range scope and experience and itxB4 s very satisfying, more so than with my 6mm at 1000m.
chop chop to 17inches works well in my friends Finfire, then try different ammo for your fine caliber SAKO, but do get some premium ammo it is really nice to have now and then.
Your gun is GOLD
peace please
 
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