Your opinion, please
- Thread starter Ian
- Start date
Ian
Notorious member
Haha! No, i've been on the move for this one for about four years now. Plus, when it happens that a mould falls into my lap, requires no work to make the bullets fit or the mould function like it's supposed to, I hit the load I want on the second try, I'm liable to stick a fork in it and put it on the "to load a pile of" list over on the progressive press bench while moving onto the next challenge.
Ian
Notorious member
......things turn to doo-doo and we get lead acrobats flying out of our muzzles in all directions.
I tried the form fit thing, practically a jam-fit of the case neck, perfect throat match, very little nose tip unsupported, everything locked together tight like a glove with chamber-length fireformed brass and nowhere for anything to go but straight.....and it didn't shoot straight! Mann did the same thing. So did Larry and Tim. All using different alloys and powders from each other. It just doesn't work very well that way using tapers. I know Eagan and Ardito made it work, but they weren't pushing the velocity envelope very fast and they started out with most of their bullets already in the throat. But give that system some wiggle room and it's a different story.
A tight fit with parallel mating surfaces works much better than a tight fit with matching tapers, I presume because the pressure curve is stretched out with the parallel version, whereas the tapered fit jams up the whole works and makes a huge pressure excursion which surely overcomes the strength of the whole bullet, not just the outside parts that are folding up as the bullet gets engraved.
fiver
Well-Known Member
well the run up does affect powder burn and sometimes very dramatically.
it's also taking quite a beating during that time.
using a convex [well more like rings stacked up on each other] tapered nose shape really helps mitigate this from happening and is how I get around it when/by using the tin.
think about how we work around things with the flowing [low tin/antimony] alloy and how Tim/Larry worked around it using lino-type.
now split the difference in shapes and alloy and your getting a ton closer to all-around.
it's also taking quite a beating during that time.
using a convex [well more like rings stacked up on each other] tapered nose shape really helps mitigate this from happening and is how I get around it when/by using the tin.
think about how we work around things with the flowing [low tin/antimony] alloy and how Tim/Larry worked around it using lino-type.
now split the difference in shapes and alloy and your getting a ton closer to all-around.
fiver
Well-Known Member
the loverign design I have is super close to the lyman version.
only the nei version makes 311 easily.
I use tin with ww's and have pushed it beyond 2400 in the 30-30 bolt action rifles.
I just lube the 2 bottom grooves.
I really think the tin helps keep the edges square and not let them roll back when the bullet is moving forward.
only the nei version makes 311 easily.
I use tin with ww's and have pushed it beyond 2400 in the 30-30 bolt action rifles.
I just lube the 2 bottom grooves.
I really think the tin helps keep the edges square and not let them roll back when the bullet is moving forward.
9
9.3X62AL
Guest
I am enjoying this thread IMMENSELY, and learning a great deal while doing so. "Lead acrobats" cracked me up!
Ian
Notorious member
I'm dragging this one back up because it didn't get the press it deserved. Basically, this is exactly what I'm designing except a little bit longer at the front band and heavier, and of course without the check shank taper and grand canyon lube groove. Brad, I didn't realize you had this mould, looks like it would be perfect for the Blackout. Any chance you could post some pictures sometime, next to a .30 Sil?
Your wish is my command.
Side by side compairison.
30 Hunter, by MP, in a 300 BO and a bullet next to it to show seating depth.
Nose damage from feed ramps when feeding from a magazine. Not ideal but being on the nose it shouldn't make a huge difference at 100 yards.
A bullet checked and sized to .310. Hard to tell but the sizer didn't touch anything in front of the crimp groove. The section right before the crimp groove measures .305 on this bullet.
Let me know what else you need Ian.
I bet this will shoot great in a Marlin 336. I need to verify that this summer.
Side by side compairison.
30 Hunter, by MP, in a 300 BO and a bullet next to it to show seating depth.
Nose damage from feed ramps when feeding from a magazine. Not ideal but being on the nose it shouldn't make a huge difference at 100 yards.
A bullet checked and sized to .310. Hard to tell but the sizer didn't touch anything in front of the crimp groove. The section right before the crimp groove measures .305 on this bullet.
Let me know what else you need Ian.
I bet this will shoot great in a Marlin 336. I need to verify that this summer.
fiver
Well-Known Member
i remember when he originally drew that hunter up.
it was modified from an rcbs design, the 150-fngc.
I don't remember why it ended up so small on the front side.
I know how the silhouette developed.
the first one was drawn up for the 7.5 swiss
but it was more like the rcbs 165 silh. boolit with the front drive band convexed outwards then sloped into the nose.
kinda like the 30 silhouette only about 15grs lighter.
airc it was cut by noe.
I had a pretty good talk with Bob about the 7.5 mold at the time since I have a few of the K rifles I looked at what he had going on and the why behind it but I had the rcbs mold working already so I bailed on that design..
anyway that eventually led down to the silh mold.
it was modified from an rcbs design, the 150-fngc.
I don't remember why it ended up so small on the front side.
I know how the silhouette developed.
the first one was drawn up for the 7.5 swiss
but it was more like the rcbs 165 silh. boolit with the front drive band convexed outwards then sloped into the nose.
kinda like the 30 silhouette only about 15grs lighter.
airc it was cut by noe.
I had a pretty good talk with Bob about the 7.5 mold at the time since I have a few of the K rifles I looked at what he had going on and the why behind it but I had the rcbs mold working already so I bailed on that design..
anyway that eventually led down to the silh mold.
Ian
Notorious member
http://accuratemolds.com/bullet_detail.php?bullet=31-188G-D.png
Tom sent me an email this afternoon alerting me that the new design is now in the catalog. Gonna order one up.
Tom sent me an email this afternoon alerting me that the new design is now in the catalog. Gonna order one up.
