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Dude, you can get banned for posting the same question over and over. Wait for replies on your ORIGINAL thread, or post more specific questions in that thread. Double-posting is not going to get you an answer any faster.
 

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No they are not less powerful. They do generally have less recoil than a bolt action because they use some of the spent gases to cycle the action.
 

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No, however each action has it design limit and so do you! More cartridges are chambered in bolt guns because its easier and cheaper then developing a auto to work with each cartridge case and load. Remember we have auto loading main tank and artillery pieces (203mm ie 8 inch guns!)

CD
 

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Are there any 8 inchers still in the active inventory. I thought that all went he way of MLRS. Too bad too IMO.
 

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I think what the OP may be referring to is that many auto-loading rifles are built in a carbine configuration and the reduction in barrel length often results in lower velocity. So, to answer the question, neither action is more "powerful", but the inherent capabilities of the cartridge are sometimes compromised by an auto-loading rifle with a relatively short barrel. For the 7RM, this would be anything less than 26" and even some bolt-actions do not have a barrel that long. A 20" barrel on a 7RM will make it "less powerful" than a 24" barrel on a 30-'06. Does that help answer your question, SquirrelSniper?
 

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Discussion Starter · #9 ·
yes and thank you,ive just heard that semi autos are less powerful due to the GASES used to cycle the action.i didnt think about the barrel lengh.
But will a 7mm mag semi auto will drop a deer at 250 yards?
 

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While it's true that some of the propelling gases are siphoned off to operate the action, the gas volume used is relatively insignificant. Furthermore, by the time the gas system unlocks the bolt and allows it to begin rearward travel, the bullet is out the barrel and pressures have dropped to a safe level. Thus, all else being equal, the difference in velocity between a gas operated semi-auto (really a bolt action operated by gas forces) and a bolt action is negligible.
 

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7mm mag in any rifle semi auto or other, I guarantee that will drop a deer at 250 yrds any days of the week if you hit in the vital area. I was hunting with a friend several years back and he shoot a cow moose across a lake with a BAR .300 Win Mag ( 180 gr. Winchester factory load ) and the cow did not go further than few yrds. No GPS on those days, but on a map 1 mile per inch that was close to a 400 yrds. shoot.
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roberto
 

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The personal experience with a BAR was with a 30.06, with my own reloads, 165 grain tip, IMR 4350 near max at 100 yds it print from 1/2" to 1-1/4" for 5 round...all the time. The BAR belong to friend of mine, he later replaced with Voere bolt action in . 270 win. caliber.
I would be disapointed if the 7mm mag did not equal or better that performance.
One other fellow I hunt with, that also own a BAR chambered for the .300 win. mag. we never got to the range togheter, but I remember He like his gun and praise the accuracy.
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roberto
 

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I can't say for sure as to how things work on a center fire rifle when it comes to bolt action vs auto loader. Mainly because I have never had two guns close to the same with only the action different. As has been posted here there are lots of other things that can account for one gun getting more velocity out of the same round.
I have however shot a lot of rim-fire 22lr. I have a 10/22 and a cz 452 varmint. The barrels on these guns are very close to the same length and I shoot the same ammunition in them. With both guns zeroed at 75 yards the 10/22 drops 8-10 inches more at 200 yards than my bolt action CZ.
This is my thoughts on this and it could be wrong, but the energy that moves the action back and forth has to come from someplace. Now if that energy was just the energy that was otherwise just going to give you more kick then it shouldn't make any difference but if some of that energy was going to be used to propel a projectile then it could make a difference.
 
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