PP large bore groups please

[charger 1]

I've been playing with this PP stuff and come to the conclusion that it doesnt have the reapetable dependability of straight cast and checked. Anyone care to show pics of large bore scoped rifle groups at 100 that just blow me away and show serious repeatabilty. I aint being smart. I/we up here wxpect nothing less than one ragged hole with cast checked. Not going to continue down a road that has no chance of same. replies with pics appreciated

[montana_charlie]

The best groups of large bore PP bullet impacts I have seen are those from FPMIII. His are hits on a steel target but it is kept painted, so the 'group' is easy to read.

Unfortunately, he doesn't get 'one ragged hole', but he also doesn't post 100 yard groups.
His most recent appear to be about five inches...and were shot at 800 yards (I think).

CM

[redneckdan]

http://i17.photobucket.com/albums/b77/redneckdan/crop.jpg

First one is at 50yds, 2nd is at 100. Lee HBC cast from range scrap, sized at .302 and wrapped with 2 laters of engineers paper, then sized and lubed with johnsons paste wax. Load is an over max charge of IMR 4350 in a .30-284, I found that this boolit has to be pushed in order to get it to work right. My load is roughly 3 grains higher than any other load I've found published for the cartridge, but I do not get any over pressure signs, expansion ring measurements are within normal limits. I only get groups this size in the summer when its well over 80* here, I think its because the load needs to be a mite hotter but I haven't tried it yet. In the winter groups will open up about .5-.75"

Here is the rifle. .30-284 chamber. 24" stainless steel barrel, bedded action and chamber area. Trued up VZ-24 action. Fajen stock. Meuller tactical 4-16 scope. I machined my own tipped trail, 60 MOA. Timmeny trigger reworked and set at 10oz.

http://i17.photobucket.com/albums/b77/redneckdan/IMGP2962.jpg

[BABore]

That gun would look mo-betta iff'in you made the bed first.:-D What? All the sheep die off up there and you got to sleep with your gun now?:mrgreen: Damn Yoopers!

Michigan Tech; where the men are men, the women are scarce, and the sheep are scared.:drinks:

[charger 1]

My ignorance revealed again.Is a 30/284 not basically a 30/06?

[felix]

Darn close, if not exact. ... felix

[BABore]

Yep! In fact the Hodgdon #26 (IIRC) lists both 30'06 and 30-284 as the same data.

[redneckdan]

Pretty much. My cases have about 2% more capacity than a .30-06 They're pretty much equals up to 180gr but after that the .30-284 pulls ahead, mainly because you can seat bullets out further and still fit into a standard length magazine.

[charger 1]

Ah so we've invented the 30/03[smilie=1:

[Doble Troble]

A 30-284 Win is pretty close to the 7.5x55 Swiss cartridge.

[RMulhern]

No! I'll save my typing effort for those that shoot BP and PP all-lead cast bullets the way they were originally intened to be shot.....in single shot rifles of the 1870s period!

[Digital Dan]

Small print says "50 yards". Also says "Offhand". 77/44, 300 grain FBFN paper patch.

http://img.photobucket.com/albums/v298/muddler/107tricks004.jpg

.56 caliber BP slug gun @ 200 yards. Sorta what you were looking for I guess. The gun was bench rested.

http://img.photobucket.com/albums/v298/muddler/DSCN3090.jpg

[303Guy]

Do five shot groups count? (With the flyer?):mrgreen:

This is not mine and it's not large bore but it is paper patched and 100yds.

http://i388.photobucket.com/albums/oo327/303Guy/100ydPP22-1.jpg

[windrider919]

Thanks 303guy, I was just going to post my pic but I did not have to. With that rifle I am still working up loads but on three shoots I got groups comparable to it.

As per repeatable groups, I do not have photos available but shooting 458 Win Mag with a custom 460gr PP bullet I get repeatable 1" groups off the bench rest almost every shooting session.

http://i290.photobucket.com/albums/ll249/windrider919/22PPExpMould159.jpg
As cast n patched w/ loaded round

For the 458 the key was to fit to the throat, not the bore [.454+.008 paper] and to put a .460 PE wad under the bullet. Also, reduced or mild loads did NOT shoot well, only when I reached 1800FPS did the groups really tighten up.

[303Guy]

Hee hee! [smilie=1: I often look at that picture in amazement!

Something that has come up regarding PP accuracy/consistency is the need for sufficient velocity or load intensity. If a loads works well in warm conditions but poorly in cold conditions .... ?

I have come accross a record I forgot I had - not definative, but I wrote down that a lighter load of AR2209/(H4350±) behind a 245gr patched boolit was less accurate than a higher load I had tested. Perhaps it is to do with how efficiently the patch comes off at the muzzle. More chamber pressure would produce more lateral 'obturation' pressure which 'breaks up' the patch better? Does that infer that for lighter loads one would need 'weaker' paper? At very low velocity, I have found stronger paper to leave bigger pieces and even stay whole like a crinkled worm skin as it got concertina'ed off in the catch rags.