The Accurate Reloading Forums THE ACCURATE RELOADING.COM FORUMS Rifles Medium Bore Rifles Tight neck chambersGo | New | Find | Notify | Tools | Reply | |
| Tight neck chambers | Login/Join |
One of Us |
Will this cause any increase in pressure? Thanks, ED | ||
|
one of us |
If the chamber neck is so tight that the case neck cannot expand enough to release the bullet completely then yes the pressure will go up. I spec my Target/varmint custom chambers to be .003"-.004" larger than a full diameter bullet loaded in Lapua brass. That way I don't have to neck turn brass. Frank "I don't know what there is about buffalo that frightens me so.....He looks like he hates you personally. He looks like you owe him money." - Robert Ruark, Horn of the Hunter, 1953 NRA Life, SAF Life, CRPA Life, DRSS lite | |||
|
| One of Us |
Ed, Tight neck chambers are custom and require neck turning brass. Neck turning allows removal of brass irregularities in neck thickness. For example, a bench rest rifle would have a tight neck custom chamber. Yes, a tight neck chamber without a properly neck turned case will increase pressue. Factory rifles should meet SAAMI specifications. | |||
|
| one of us |
Not only will it jack up the pressure in factory and unturned brass reloads, it will mean you have to beat the bolt open after each shot. Depending on the chamber and loads, it could require a serious beating to get the bolt open. On a Rem 700 or soemthing you could break off the bolt handle. Tight necks look cool on paper, but suck for almost every real world application. Unless you are shooting in a true bench rest set up with excellent front and rear rests and wind flags, it is just like a monkey screwing a football. All kinds of noise and gyrations, but nothing is getting accomplished. I screwed up and ordered a tight neck reamer one time. The novelty quickly wore off and I wound up reaming the neck on my chamber. But if you want the ultimate in accuracy for shooting in competition or something, then it will definitely help. Not of any use big game hunting, but for benchrest, sihlouette, and the like, it is pretty much mandatory. | |||
|
| One of Us |
Tight neck chambers are not something you want on hunting rifles, where store bought ammo might be used in them. I have no tight neck chambers on any rifle today, but did have four rifles that had tight necks when centerfire benchrest shooting. I was constantly measuring case necks after firing to make sure they hadn't thickened up, which would cause pressure problems. My rifles had the neck diameter stamped on the barrel too, so anyone getting their hands on the rifle would know that they weren't regular SAAMI chambers. Don | |||
|
| one of us |
DMB- the factory ammo thing you mention is one of the reasons I opened the throat on that rifle. Rifle in question was a .223 on a Kimber of Oregon M84 (3 digit serial number from early-mid '80's). I realized that if prepped brass was not loaded, i could not just buy a box of .223 and astart shooting. It was a fairly light .223 with nice wood stock, and there was just nothing to be lost by getting rid of the tight neck, and a lot of work and inconvenience if I kept it that way | |||
|
| Powered by Social Strata |
 | Please Wait. Your request is being processed... |
|
Visit our on-line store for AR Memorabilia