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Q:
I'm reloading some 270 with 110 gr Hornady V max. While inserting the bullet into a fired case I noticed the bullet has a somewhat tight feel, so I compared the size of the v max to an unfired 130 gr Winchester. The 270, 130 gr Winchester bullet seems smaller in width than the 110 v max , while the 11o v max barely fits into the fired case the unfired winchester bullet easily slides into the fired case. Do bullets from different bullet manufacturers vary in size this much? If not whaat am I seeing?
Question by Cgull. Uploaded on February 24, 2010
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Answers (6)
Hmmm. Sounds interesting (scary?). Why don't you mike the two bullets (with a michrometer) and see how they measure up? Let us know what you find.
Amen Honker! Shouldn't be that much difference. Perhaps some mis boxed .284's?
Did you check the part numbers and find out if the maker has that caliber in more than one diameter?
There's a comment here by me some time ago, that while I was reloading .357, I could get bullets in .356, .357, and .358. The only other round I found like that was .44.
I would take the advice above and measure the bullet diameter of several bullets you have and compare. In an interference fit like the bullet in the fired case mouth, 0.0005" or 0.001" can make a difference in how tight the fit is. I tried to look up the SAAMI spec for .277 bullets, but the link I had was busted. May be a quality control issue with Hornady or Winchester. Surprise there?
It is unlikely that the diameter of the bullets are different but as WAM said, a little bit makes a big difference. Those boys are pretty good about holding .277. I suspect you are seeing fat case necks on some cases that have been fired. Not all case necks are the same wall thickness and as a matter of fact, they vary quite a bit as you shoot the cases multiple times and brass gradually flows up into the neck. When you fire the round, the neck is blown out to the external diameter of the chamber. The outside diameters will therefore be the same but the inner diameter will vary. When you size the case, you pull the neck over a .277 diameter expander ball. After this step, the interior of the cases will be the same and they should provide the same resistance to each bullet. As a matter of fact it should be very difficult for your to insert the bullet into the neck of a sized case. This leads me to think that you were comparing multiple cases. Is that what happened? Or did you notice the diameter difference on the exact same case? Were the cases sized? Had they been fired previously?
I have had the same problem with v max for w.270 they won't fit all the way in the case..weird but they shoot great!
Post an Answer
Hmmm. Sounds interesting (scary?). Why don't you mike the two bullets (with a michrometer) and see how they measure up? Let us know what you find.
Amen Honker! Shouldn't be that much difference. Perhaps some mis boxed .284's?
Did you check the part numbers and find out if the maker has that caliber in more than one diameter?
There's a comment here by me some time ago, that while I was reloading .357, I could get bullets in .356, .357, and .358. The only other round I found like that was .44.
I would take the advice above and measure the bullet diameter of several bullets you have and compare. In an interference fit like the bullet in the fired case mouth, 0.0005" or 0.001" can make a difference in how tight the fit is. I tried to look up the SAAMI spec for .277 bullets, but the link I had was busted. May be a quality control issue with Hornady or Winchester. Surprise there?
It is unlikely that the diameter of the bullets are different but as WAM said, a little bit makes a big difference. Those boys are pretty good about holding .277. I suspect you are seeing fat case necks on some cases that have been fired. Not all case necks are the same wall thickness and as a matter of fact, they vary quite a bit as you shoot the cases multiple times and brass gradually flows up into the neck. When you fire the round, the neck is blown out to the external diameter of the chamber. The outside diameters will therefore be the same but the inner diameter will vary. When you size the case, you pull the neck over a .277 diameter expander ball. After this step, the interior of the cases will be the same and they should provide the same resistance to each bullet. As a matter of fact it should be very difficult for your to insert the bullet into the neck of a sized case. This leads me to think that you were comparing multiple cases. Is that what happened? Or did you notice the diameter difference on the exact same case? Were the cases sized? Had they been fired previously?
I have had the same problem with v max for w.270 they won't fit all the way in the case..weird but they shoot great!
Post an Answer