GTA
All Springer/NP/PCP Air Gun Discussion General => Projectiles => Boolit and Pellet Casting => Topic started by: Hobbyman2007 on September 19, 2018, 08:14:06 PM
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I haven’t done a whole lot of testing and as a matter of fact I’ve only shot the 257420 on paper. I have another which is the 257388 spire point mould but really only shot them over the chrony . I’ve got two rifles in that caliber one is capable of 140fpe as it is now and the other is good to about 160 fpe ( Cothran valve in it ) so it should be capable of quite a bit more ,both have a 1:14” twist TJ’s barrels . Right now the 257420 is my go to bullet and have been shooting them as cast due to size . My barrels are a little on the big side at .2583” and the 257420 drops at .2578 “.I have placed an order for a 63 gr mould from NOE. Like to see what others are using .
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Nielsen Specialty Ammo (NSA) 85gr boattail.
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I've been wondering, does anyone have the BC numbers for 257420 and 257388? One bullet that was mentioned in TAG threads as accurate one in 14" twist barrels is 92 grain "Noble" http://arsenalmolds.com/products?product_id=93 (http://arsenalmolds.com/products?product_id=93)
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The Noble is a lengthened 257420. A genuine Lyman 257420 drops at .260. The copy from Arsenal is much smaller. Odd on the barrel size, Mine is .2573".
I have found the .257420, NOE 84 Ranchdog, and the Lyman 388 to all be extremely accurate.
I modified a Spire point mold from NOE, (slight flat meplat) and it is the most accurate bullet I have. Under 1/4" AT 80 Yards Regularly. Well under 1/2" at 100, and often right at 3/8". Need to HP it for game. Too tapered for good impact. Just like the 388, punches needle holes in game. Just a wee bit better.
Knife
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I have couple old Ideal molds which if i remember correctly was accurate. Those are molds which i think Tofazfou and Dough(?) used earlier tests for .257 Ideal 257388 80 grains and other was same but 90 grains. Sadly i haven't got time or changes to test my self those bullets.
http://www.three-peaks.net/bullet_molds.htm (http://www.three-peaks.net/bullet_molds.htm)
Other that 90 grain bullet isn't that list or do i missing something.. Molds are probably way older than my self but cast's perfectly.
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The 338 is extremely hard to find. Even on the bay, the price skyrockets! And sadly, most if not all are single cavity, and hard to see in the pics when offered, the condition they are in. :(
this es exactly why I modded the NOE Spire Point bullet in .257 by decking the mold, which brought it down from 110 gr. to an 80 grain bullet.
Knife
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Yeah i know. But still i had good luck with those purchases. Taking risk to get those Ideal molds from ebay and those where top condition. 1- cativy dosen't bother me im not in hurry when casting. And what comes price...I kind collecting those molds and Ideal,Ohaus,Winchester etc. are treasures for me so. And i got few of those molds very reasonable price. Only had one bad quality mold from ebay. And seller offers money back but i keep it. It was painted so i removed paint off and its fine now.
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This shows the 80 gr HOE RD Hollow point by Eric of Hollow Point Mold services, and the Spire Point modded to 80 grains, Shoots very similar to the Ideal/ Lyman 338
Cast thes when I was first learning to cast. LOL
Knife
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Knife , that HP looks great . I’ve got the 388 from arsenal that I’ve been on the fence sending to Erik. They are a little heavy for both my guns . I think I’ll be sending him two molds this week .
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Eric sure doed fine work Denis! ;)
Knife
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From what I’ve seen and read Erik is about the only place I’d send a mold to HP. It sure would be nice if Al at Noe would make his molds available that way right from the start . I would pay a premium and I’d still save from shipping back and forth . I’d also like to find a 257420 in .260 “ so I could size them down to bore size . I’m shooting mine as cast and have a feeling they would do better ( not that their bad ) properly sized for my barrel.
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I have heard that the Lyman 257420 FN solid 73 gr. has a BC of about 0.14.... It has an SD of 0.157, and flat-based bullets with a decent Meplat often have a Form Factor of about 1.1-1.15, so that makes sense.... If the BC is 0.14, the FF is (0.157 / 1.14) = 1.12.... The HP version should therefore have a lower BC in proportion to its lower weight.... If it is 66 gr. (like the one I have), with an SD of 0.143, you would expect the BC to be between 0.125-0.130.... just a bit better than a .22LR bullet....
Unless you have a lot of power on tap, it is pretty hard to beat the 257420.... I would consider it the "go-to" bullet for most .257s.... You need quite a bit of power (170-200 FPE) to step up to an 85-90 gr. bullet, and drive it fast enough to warrant using that, IMO....
Bob
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From what I’ve seen and read Erik is about the only place I’d send a mold to HP. It sure would be nice if Al at Noe would make his molds available that way right from the start . I would pay a premium and I’d still save from shipping back and forth . I’d also like to find a 257420 in .260 “ so I could size them down to bore size . I’m shooting mine as cast and have a feeling they would do better ( not that their bad ) properly sized for my barrel.
How about enlarging the mold a bit, a bullet with a shaft attached to a drill and some grinding paste? There was a video of that being done somewhere.
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I’d also like to find a 257420 in .260 “ so I could size them down to bore size . I’m shooting mine as cast and have a feeling they would do better ( not that their bad ) properly sized for my barrel.
Did you ask Jared if he could do it wider? I have few molds which he make it wider when i ask about it.
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From what I’ve seen and read Erik is about the only place I’d send a mold to HP. It sure would be nice if Al at Noe would make his molds available that way right from the start . I would pay a premium and I’d still save from shipping back and forth . I’d also like to find a 257420 in .260 “ so I could size them down to bore size . I’m shooting mine as cast and have a feeling they would do better ( not that their bad ) properly sized for my barrel.
If your not in a hurry to cast a lot of bullets, Lyman still makes the 257420 iron mold. It's a two cavity, and throws them at 260 out of my two molds. One is a HP mold by Eric.
It is slow casting though. LOL
Knife. .
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Pretty sure Jared at Arsenal can make the 257420 larger....
Bob
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Sure easier than making it smaller! ;)
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I’m still waiting to get a 63 grain mold from NOE. If these shoot well I won’t be concerned with the slightly undersized 257420. I’ve looked at the Lyman but just can’t get myself to hit the buy button on a 2 cavity mold .
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Nothing wrong with 2 cavity.... You can cast fast and longer because it wont get so hot on small calibers. I actually like 2 cavity molds for those reasons. Have 2 cavity RCBS .30 cal mold and can drop 500-1000 bullets with out any problem. It is very fast casting...
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I’m still waiting to get a 63 grain mold from NOE. If these shoot well I won’t be concerned with the slightly undersized 257420. I’ve looked at the Lyman but just can’t get myself to hit the buy button on a 2 cavity mold .
Not to mention the Lyman is heavy for a 2 cavity. For whatever reason, is can't cast as nice as a NOE, or Arsinel mold.
I have several lyman molds, and one is hp'd by Eric. It too is the lyman 257420, and deadly accurate.
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Maybe I’ll just pull the trigger on the Lyman and have it shipped straight to Erik . This way I can cast a pile of FP or have a separate HP mold for hunting .
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Does Lyman still make steel molds, I sure did like some of the old Lyman molds that I had.
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Wayne
Can you please post a couple of photo's, NO big hurry for them, when you get some time......... ;)
showing either the 22 cal or 25 cal, (if they have the same design) of these pins and the adjusters for them,
I have visions of the Lyman pins with the wooden balls etc. LOL
I can't seem to find any photo's on the NOE's site of these pins/adjusters etc.
Tia,
Don
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(https://i.imgur.com/zpL6Bi3.jpg)
(https://i.imgur.com/52L2DEi.jpg)
(https://i.imgur.com/acGgy0V.jpg)
(https://i.imgur.com/B8WVyxq.jpg)
(https://i.imgur.com/EeYVuje.jpg)
(https://i.imgur.com/kQeTfGA.jpg)
The pin height is adjusted by bending the black "L" brackets
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Loren
Thank you for those OUTSTANDING photo's,
they explain a lot to me, nice since I have Never seen/held a NOE mold before. They sure are pretty......... 8)
Question for you,
If you want to change weights or go for the solid base, you just change pins and adjust to fit etc?
Thank you,
Don
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Does Lyman still make steel molds, I sure did like some of the old Lyman molds that I had.
Yep, they do, but I believe they are iron. Steel would have issues with alloys and heat. Constantly changing hardness and hence dimensions between castings.
They are what is known as Black Iron in the metal industry. Don't know what they call them. Much like good cast iron frying pans of old. Although the dealers/sellers call it steel.
They use to be reasonably priced. Now, the much more finely made Noe is lower cost, and vastly superior! ;)
Knife
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Question for you,
If you want to change weights or go for the solid base, you just change pins and adjust to fit etc?
Thank you,
Don
Correct! Remove the rounded head screw which opens a "key hole" to remove and insert the core pin. I would bet 99% of the time no adjustment needed from one set of pins the another.
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Loren
Thank you. 8)
Don
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Ran a batch of the 257420 tonight off a Lyman mold.
(https://i.imgur.com/5mvLxvW.jpg)
(https://i.imgur.com/L13bxzS.jpg)
(https://i.imgur.com/HDpWGm9.jpg?1)
(https://i.imgur.com/DUcVSOE.jpg?1)
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I would love to hear some reports on the 257-65-FN BBT...
Found one report of 1-1.5 moa at 100 yards...
http://noebulletmolds.com/smf/index.php/topic,1094.15.html (http://noebulletmolds.com/smf/index.php/topic,1094.15.html)
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Old thread I know but Ibe been liking the NOE bt hp I think bob designed. Its 72gr hp this is 175yds it shoots well and smacks really hard
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Excellent shooting!! That sure gives you some solid bragging rights.
Tell us more about the rifle....etc
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Excellent shooting!! That sure gives you some solid bragging rights.
Tell us more about the rifle....etc
Thanks Loren! Its a .257 Texan 2800psi reg 1015fps. I did fire lap the barrel and it has a MD Recon stock with Dougs end cap to stiffen the barrel.
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Well you sure have it dialed in! Very fine shooting !!