Opinions on LT-30 for 6ppc 68 grain bullet
- Thread starter smoke-um
- Start date
jackieschmidt
Gold $$ Contributor
It will work great in the lower and medium load windows.
But if you try to duplicate the velocities that many of us obtain with 133 in the upper load window, (3400+ fps), you probably won’t need a primer decamping tool.
I know from experience.
But if you try to duplicate the velocities that many of us obtain with 133 in the upper load window, (3400+ fps), you probably won’t need a primer decamping tool.
I know from experience.
Dusty Stevens
Shiner
LT32 is a bit faster than 133, lt30 is too fast. They need an lt33
I get 3410 with LT32 and it’s at the neck shoulder junction, shoots very well and stays in tune.
I have blended the two and it shoots well.
In what? What caliber? I have heard people do this but have never heard what they are shooting it in.
Mulligan
Silver $$ Contributor
Dusty, isn't 2015 a slower version of LT-32?
CW
Dusty Stevens
Shiner
I havent seen enough difference in all the years to worry much about it. I work up the loads during the match so it doesnt matter. If youre talking about LT it isnt lotted by years its single digit numbers
Larry Koch
Silver $$ Contributor
Dusty, Pleas translate what you mean? Because I have 3 lot numbers of LT. If youre talking about LT it isnt lotted by years its single digit numbers
Mulligan
Silver $$ Contributor
Sorry Dusty, I wasn’t very clear at all.
I am under the impression that LT30, LT-32, and 2015 are all fairly similar like n-130, n133, and n135. Maybe I’m wrong?
CW
As Rocky Balboa always said, ABSOLUTLY.
There are 2
There were a few versions of AA2015. There was AA2015BR and AA2015 XMP, and AA2015. I use to use the 2015BR in my 30BR but the XMR stuff was way too slow. It would be like using N135 in a 30BR. I don't know the burn rate of the current production one because I don't have any.
Last edited:
Jager
Gold $$ Contributor
Yes, they are all three very similar. The story is somewhat convoluted, but the short version goes like this...
During the sixties, Dupont developed a powder, originally intended (but never used) for use in the then-new M16/5.56. They called the powder 8208 (not the same as Hodgdon's 8208). After awhile, with no apparent use for the powder, they declared it surplus.
Thunderbird purchased three lots of this powder.
Thinking it might be useful in benchrest cartridges, Thunderbird contacted Walt Berger. He tested the three lots, and really liked one of them. He bought the entire lot. That lot was sold as the now rather famous T-32.
As that lot of T-32 began to dry up, discussions were had with Hodgdon and Western Powder about recreating it. Western approached the Canadian facility which had created the original lot for Dupont. A deal was reached and that's how LT-32 came to be. LT-32 was (and presumably still is) made on the same machinery and has the same geometry as A2015. Its deterrent coating is slightly different, and according to Keith Anderson, Western's chief ballistician at the time, A2015 is about 10% slower than LT-32.
Recognizing that LT-32 was just a little bit too slow for cartridges like .30 BR, a few years later Western introduced LT-30, a "slightly faster" powder than LT-32, again by adjusting the deterrent coating. How much faster? I've never seen anything that specs the exact difference, but it appears to me to be on the order of 5-6%.
One other interesting detail with LT-32 and LT-30 (and presumably A2015, as well, though I've not seen it explicitly stated for that powder) is that those powders are supposedly held to a stricter 5% lot-to-lot burning rate variation than the more typical 15% seen in the industry.
TRSR8
Silver $$ Contributor
Been shooting LT 30 for a couple years,weekly in club matches, no registered matches, summer and winter. Several of us in fact have.
27.3 behind a 66 gr. 7-11 yields 3400+ in two barrels with no issue. Light neck tension.Temp and moisture don’t seem to impact it much
Going to 27.5 yielded harder bolt lift.
Seems to lay down a bit more carbon.
27.3 behind a 66 gr. 7-11 yields 3400+ in two barrels with no issue. Light neck tension.Temp and moisture don’t seem to impact it much
Going to 27.5 yielded harder bolt lift.
Seems to lay down a bit more carbon.
Dusty Stevens
Shiner
2015br is similar in burn rate to h322 and n133 but not as good
jackieschmidt
Gold $$ Contributor
I have several jugs of the old 2015 BR. We are talking 25 years old.
29.0 grns of it duplicates the same velocity as 30.5 grns of 133.
29.0 grns of it duplicates the same velocity as 30.5 grns of 133.
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