7mmstw v. 7mm ultrmag
#21
RE: 7mmstw v. 7mm ultrmag
bigcountry-
I think that could have to do with several factors. One that I feel is probably most prevalent is the fact that the Barnes is and all-copper bullet, producing higher pressures with less powder than the Partition with its lead core bullet, thus attaining a max load with less powder. Could also be the barrel that they tested in, does it say exactly, could it be a standard test barrel, or an actual firearm? Just some things to consider.
Wolf, my smith also likes that load but with a 139gr Hornady. What I don't get about the STW, is the variations between manuals. I mean you 4gr I think over max in the Nosler manual, but right at max in the barnes manual. (its usually the other way around). According to IMR, its under max. Either Nosler really has this caliber underloaded or Barnes has it way overloaded. I mean they are kicking a 140gr bullet over 3400fps.
#22
Guest
Posts: n/a
RE: 7mmstw v. 7mm ultrmag
Charlie, thats what I am trying to tell you. Max load for the Barnes 140gr is like 4gr over max load for a Nosler 140gr. It typically is always the other way around. Your right about the barrels used. But historically, it has been said with the STW, factory loads are underloaded and not near the 65KPSI. There has to be a reason for it.
#23
RE: 7mmstw v. 7mm ultrmag
But historically, it has been said with the STW, factory loads are underloaded and not near the 65KPSI. There has to be a reason for it.
I think there is a good chance that the underloading may be more for marketing reasons than practical reasons.
Mike
#26
RE: 7mmstw v. 7mm ultrmag
Bigcountry- I must have misread your original post regarding that 4 grains. It looked to me like you were saying Barnes was at, say 75g, and Nosler was at say, 79 grains, which would make sense, I guess it is the other way around, even though I looked at it like 5 times before posting[8D]
#27
Join Date: Feb 2003
Location: Boise ID USA
Posts: 153
RE: 7mmstw v. 7mm ultrmag
Stubblejumper,
I was discussing some of the things you were talking about with my gunsmith, but regarding the 300 Ultra. I had read some posts from a few months back about some guys critising the 300 ultra and talking about how inaccurate they were. Some of the guys were blaming the round. After discussing this with my gunsmith, he was saying people are to quick to blame a round. That in his opinion it comes down to the rifle. I think why you were seeing good results on multiple loads was that you had a custom rifle. Not doubting your ability to handload good, but if your gunsmith who blueprinted the action and rebarreled the gun for you was any good then you should have no problem shooting any quality bullet with 1/2" accuracy.
I was discussing some of the things you were talking about with my gunsmith, but regarding the 300 Ultra. I had read some posts from a few months back about some guys critising the 300 ultra and talking about how inaccurate they were. Some of the guys were blaming the round. After discussing this with my gunsmith, he was saying people are to quick to blame a round. That in his opinion it comes down to the rifle. I think why you were seeing good results on multiple loads was that you had a custom rifle. Not doubting your ability to handload good, but if your gunsmith who blueprinted the action and rebarreled the gun for you was any good then you should have no problem shooting any quality bullet with 1/2" accuracy.
#28
Guest
Posts: n/a
RE: 7mmstw v. 7mm ultrmag
I have a 300RUM, and have had a few. And I like them. They are finicky. They will have large velocity spreads upwards of 50-70fps. This is pretty well understandable with a overbore cartridge like the 300RUM that uses upwards of 101grs of powder. Also, there is some freebore in the chambers. It helps get to those velocity numbers safely.
Inheritly accurate calibers generally don't have these attibutes. So if its too hard for your gunsmith to understand, you need to find a new gunsmith. I like the RUM's but also understand how it can be inaccurate. I have a few loads that are .5MOA. But it takes twice the amount of work for me to hone in those numbers. than it would a WSM or 308win.
Inheritly accurate calibers generally don't have these attibutes. So if its too hard for your gunsmith to understand, you need to find a new gunsmith. I like the RUM's but also understand how it can be inaccurate. I have a few loads that are .5MOA. But it takes twice the amount of work for me to hone in those numbers. than it would a WSM or 308win.