.270 oal question

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gmac

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Hi, i am relativley new to reloading(1 1/2 yrs) and i am finding some weird numbers for my new rem 700 ti in 270 winchester with 140 bt tsx.
I measured the distance to the lands using an empty cartridge, with cuts in the neck and the bullet in it, chambering it into the rifle, measuring the overall length, then subtracting 0.050" as barnes recomends. The length is 3.320" which is quite a bit longer than Barnes load data (3.210"). As well the bullet is extended out to half way in the second groove of the bullet. I have never had a tsx hang out that far or been that far off of the tested Barnes oal or measurements from factory loads. The other guns i have loaded with Barnes are; Ruger 338 mag with 225gn bt, Rem 700 bdl 30-06 with 180gn fb.
I have measured this distance, and duplicated the results at least 10 times now. Does this sound normal?
Any opinions would be greatly appreciated.
 
Load that mutha and head for the range! Typically OAL that are too long are not dangerous unless you're jamming the bullet into the lands. It's the too-short OAL that give you bad, bad pressure problems. The situation you describe is 100% safe.

BTW I've had excellent results with that exact same bullet in the .270, I found 60 grains of RL 22 got me to 3150 comfortably, with shot-to-shot deviation of just 17fps. IMR 7828 was just as accurate, but didn't give me the velocity I was looking for. Good luck!
 
Thanks for the replies.
I loaded some with h4350 and had terrible results so I was starting all over again and thought I had better ask some questions. I'm trying to see if I am able to shoot h4350 acceptably as my .338mag and 30-06 both like that powder. I guess I'm just being lazy hoping all 3 guns will shoot as good as I need them to with the same powder.
I was lucky with my .338mag, worked up to 70gns h4350 and I now get 1" groups all day long. I have gone higher but this load shoots very consistantly with no pressure signs and good brass life.
 
If it's any consolation I got my worst results from H4350 of all the powders I tried (RL 22, IMR 7828, H4350, RL 19, IMR 4831). Terrible accuracy, terrible velocity. Just not the powder for the 140 TSX....
 
Just a suggestion to try next time you measure the length to the lands.

Use a long flat base bullet seated base forward in the case to find your length to the lands. Seat the bullet in an unaltered case which has been resized. This will prevent the bullet from being partially withdrawn when you unchamber the round. Chamber the round, and the base of the bullet will bump up against the lands, and continued pressure will push the bullet into the case. Keep this length gauge for future reference, or at the very least record the length for future use.

Now you can use the measurement of the length gauge to measure the length of your round to the ogive of the bullet. The ogive can be found by taking a bullet and pushing it firmly nose down into the muzzle of your rifle, then turning it with your fingers. A line will be scribed by the lands at the ogive. Set your seater so that this scribed line matches the length of your length gauge.

I have found this system to be the most accurate way of determining cartridge OAL. I even like it better then the Stony Point cartridge length gauge. Your rifle muzzle makes a pretty good bullet comparator.
 
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