Forums
New posts
Search forums
What's new
Articles
Latest reviews
Author list
Classifieds
Log in
Register
What's new
Search
Search
Search titles and first posts only
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Freebore in a hunting rifle.
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="Buffalobob" data-source="post: 88816" data-attributes="member: 8"><p>Back in the good old days when everybody shot an old slow gun, Roy Weatherby decided to try something different and see if he could sell fast guns. His ammo has the term "Ultra velocity" and there are two things that get that. Large case capacity and about 0.375 inches of non-rifled "tube" which allows the bullet to get a running start before hitting the lands. This tube allows the gases to expand against less pressure immediately and then encounter pressure once there is more volume.</p><p></p><p>Many (all factory ?) rifles are freebored other than Weatherby and you just haven't encountered them yet. Rugers have a good bit. I think Sako has a lot. How much freebore varies, but the factories must protect themselves from idiots. (example of an idiot- guy at the range about three months ago buys a Weatherby rifle at Walmart but they got no ammo, so he goes to another store and wants to buy some ammo for a Weatherby 270 so they sell him some 270 Wby for his wby vanguard in 270 Win. He did his very best to get the bolt closed on that ammo). Freebore is a safety cushion for pressure.</p><p></p><p>Free bore and accuracy. The free bore area is not neck diameter so the bullet is not really rattling around in there before it hits the lands, but it does have some speed when it hits the lands and this causes a lot more stress on the jacket/bullet. Long bearing surface bullets will slide down the "tube" more aligned than short bearing surface bullets and will have more bearing surface to get everything straight once it is engaged in the rifling. I have shot 162 gr HPBTs, 168 gr SMKs and 160Accubonds at about 0.7-0.8MOA for 5 shoots for years and years. I used to shoot in my 7mm Mark V the little short Speer 115 HPs at about MOA. You will not get benchrest accuracy from a freebored gun but you should be able to stay well under MOA and down close to half MOA . Some where in the last two days Goodgrouper talks about the two sweets spots. One close to the lands and another backed off. With a lot of freebore you have to find the one backed off. Its there you just have to work at it and if you love messing around with a gun it is really not work just an excuse to have fun. A few months ago I posted a picture of a 500yds groups from my 240Wby shooting the little short 70gr Sierra MKs. Accuracy with that bullet is about 0.5 plus or minus what kind of day I am having. 7mm Wby is (was) good for 0.6MOA to 1200 yds for 5 shots. That kind of accuracy is in the kill zone for anything with hoofs and will scare the snot out of a lot of the little furry things.</p><p></p><p></p><p>One other thing you have to realize is that there are people on this forum that have recurrent rabies and will start foaming and slobbering at the mouth as soon as the word Weatherby is typed. These Weatherby bashers come in two different flavors- those that had one but couldn't get it to shoot and those who have never had one. We all have our prejudices and with me it is BMWs and Mercedes – I hate the sight of them.</p><p></p><p>For a hunting rifle if you are willing to accept accuracy in between 0.5 and 1.0 MOA a Wby will deliver that with work on your part . If you have to have one raggedy hole then good luck. </p><p></p><p>I will add one other thing, With a Weatherby you get a bolt shroud that works. Stuff will not come back into your face when a primer blows like it will with a Remington. I am one of the idiots that Wby was thinking of when he designed the gun.</p></blockquote><p></p>
[QUOTE="Buffalobob, post: 88816, member: 8"] Back in the good old days when everybody shot an old slow gun, Roy Weatherby decided to try something different and see if he could sell fast guns. His ammo has the term “Ultra velocity” and there are two things that get that. Large case capacity and about 0.375 inches of non-rifled “tube” which allows the bullet to get a running start before hitting the lands. This tube allows the gases to expand against less pressure immediately and then encounter pressure once there is more volume. Many (all factory ?) rifles are freebored other than Weatherby and you just haven’t encountered them yet. Rugers have a good bit. I think Sako has a lot. How much freebore varies, but the factories must protect themselves from idiots. (example of an idiot- guy at the range about three months ago buys a Weatherby rifle at Walmart but they got no ammo, so he goes to another store and wants to buy some ammo for a Weatherby 270 so they sell him some 270 Wby for his wby vanguard in 270 Win. He did his very best to get the bolt closed on that ammo). Freebore is a safety cushion for pressure. Free bore and accuracy. The free bore area is not neck diameter so the bullet is not really rattling around in there before it hits the lands, but it does have some speed when it hits the lands and this causes a lot more stress on the jacket/bullet. Long bearing surface bullets will slide down the “tube” more aligned than short bearing surface bullets and will have more bearing surface to get everything straight once it is engaged in the rifling. I have shot 162 gr HPBTs, 168 gr SMKs and 160Accubonds at about 0.7-0.8MOA for 5 shoots for years and years. I used to shoot in my 7mm Mark V the little short Speer 115 HPs at about MOA. You will not get benchrest accuracy from a freebored gun but you should be able to stay well under MOA and down close to half MOA . Some where in the last two days Goodgrouper talks about the two sweets spots. One close to the lands and another backed off. With a lot of freebore you have to find the one backed off. Its there you just have to work at it and if you love messing around with a gun it is really not work just an excuse to have fun. A few months ago I posted a picture of a 500yds groups from my 240Wby shooting the little short 70gr Sierra MKs. Accuracy with that bullet is about 0.5 plus or minus what kind of day I am having. 7mm Wby is (was) good for 0.6MOA to 1200 yds for 5 shots. That kind of accuracy is in the kill zone for anything with hoofs and will scare the snot out of a lot of the little furry things. One other thing you have to realize is that there are people on this forum that have recurrent rabies and will start foaming and slobbering at the mouth as soon as the word Weatherby is typed. These Weatherby bashers come in two different flavors- those that had one but couldn’t get it to shoot and those who have never had one. We all have our prejudices and with me it is BMWs and Mercedes – I hate the sight of them. For a hunting rifle if you are willing to accept accuracy in between 0.5 and 1.0 MOA a Wby will deliver that with work on your part . If you have to have one raggedy hole then good luck. I will add one other thing, With a Weatherby you get a bolt shroud that works. Stuff will not come back into your face when a primer blows like it will with a Remington. I am one of the idiots that Wby was thinking of when he designed the gun. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Freebore in a hunting rifle.
Top