Been working on a new : HP bullets for target shooting!

Eutectic

Active Member
In my mind this is the yaw dampening Ian referenced earlier. Is this a correct assumption?
This is basically correct. Ian has given you a good answer already. My father shot a load he called the '300 Meter Load' back before the war (30's). They could get FA M-1 bullets or 'machine gun bullets' as they called them. 172grs with a long boattail. He loaded FA 70 primers and 36.4grs of Hivel #2. Maybe 2100fps or a little more...It was superbly accurate at 300. My Dad said groups at 200 yards were no better than 300 meters! And up to 150 he saw slightly oval holes... He told me the bullet went to sleep at 300. This was an '03 with 1 in 10" twist.

Some relate yaw to a just spun top.... How it wobbles and then smooths out. Our so called normal yaw works like this (I think) But my father's example doesn't. It had help! The top would get worse and it would fall over in my father's case.
I call this help a 'compressed helix' and got into a quite lively discussion over on 'Cast Bullets' 7 or 8 years ago. Some may remember...

Pete
 

RBHarter

West Central AR
GI stock now has a 308 172gr match .
There is a 178 gr match for the cal 30 model of 1906 .
New stuff from LC and FC as recently as 96'.
 

JWFilips

Well-Known Member
:rolleyes: I guess I will just keep trying to shoot HP bullets and compare the results to shooting the same in solid....& record my results!
Great thread but I got totally lost!
Jim
 

Eutectic

Active Member
Sorry I helped derail your thread Jim. Test the H.P.'s! Like I said 80% of the time for me the same bullet is more accurate hollow pointed. Be fussy casting! Keep the pin(s) hot! One nice air bubble in the cavity bottom to one side will probably be a flier. I find I can live with a cavity .002" off center...... anymore and accuracy goes south. Check or have someone check a HP mold if it's used. They can be off center and cast off center with no decent fix. (As someone mentioned) My most accurate first bullet I ever cast many years ago for my first 'big' gun, a Trapdoor Springfield, was with the Gould hollow point! Still got the old mold (although I modified it to paper patch)
Test them against your solids..... I think you will be happy!

Pete
 

fiver

Well-Known Member
Jim you gotta admit when we swerve a thread it gets real interesting.
this is one of the better discussions I have seen in a long, long time.


one comment on the bow lightening.
IMO and this is just off the top of my head, I think the speed increase is because you get more deflection of the thinner ends. [they spring back the other direction further and faster]
 

Intheshop

Banned
Sorry for the derail JW.

Precision,precision...swaging works because of it.The more accurate the cartridge build process to include the HP.....amongst a dz other things....the quicker the bullet straightens up(goes to sleep).

How far some are willing to press the accuracy envelope,I don't think has ever been questioned here.One person's rabbit hole is just that....his.I've got a fixture in mind that "should" solve several issues with cast HP swaging,accuracy potential.Since I enjoy design/build on this sort of tooling,it's fun.It's definitely gonna be for my 7-08.

Which brings up one......oh heck,here we go again point.But,seriously.....I shoot a lot of skinny,jacked up .22 CB's,where bullet stiffness and it's subsequent effect on stability to include yaw angles and precipitation,may be more noticeable than on .300's and up.
 

Intheshop

Banned
Forget the stupid bows,haha.Want to talk RPM's .....of an engine.Think where,over the counter sportbike engines hit the rev limiter these days.15,000

Compare that to back in Smokie's day (Yunuck,a personal hero)....when he was showing GM what they said was a limit to piston speed.The problem is NOT someone setting some stupid limit,just don't be condescending when you do it.That,IMO is what gets folks hackles up.I call it the American spirit......just when you think you've tryed,or seen it all sort of thing.
 

JWFilips

Well-Known Member
Well Guys I would never call this "derailment" when we are learning stuff!:D
I just have to try to keep up! So much to learn ...so little time!
Jim
 

S Mac

Sept. 10, 2021 Steve left us. You are missed.
Back to your original post Jim, I'm interested in your results. When you get a chance please post particulars.
 
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JWFilips

Well-Known Member
Well,
My Savage 340 30-30 has recently been through a lot of Plastic surgery! She had had a Glass bed & her throat reamed and a Scope installed!
Just shot these 2 targets with HP bullets....First time out after surgery and with the improper COL's based on the old throat!
Keep in mind I'm ony shooting target ...not hunting type loads!
A lot of Cudos for Ben & Ian's help!
Jim
8-18-17%20311467%20test.jpg


8-18-17%20test%20311291.jpg
 

JWFilips

Well-Known Member
Back in the 1980's I put a lot of stock into Boat tail HP jacketed bullets ........I see now that plain base and cast may be "king" in the target sector! Velocity is way under my old world shooting but it is a whole new world! trying for one hole groups at 1100 fps is a challenge when I was used to 1 hole groups at 3800 fps in the 80's with jacketed!
Easier on my shoulder and body too!
 

fiver

Well-Known Member
don't be afraid to try rifle primers in those loads.

it looks like your gonna be able to use both of those aiming points on that target.
I buy those same target types and staple them up then shoot that same paper all day, or....
that gives me 16 different aim points to work with on one 8x11 paper, I can use it for several range sessions and keep side by side track of my progress.
 

KHornet

Well-Known Member
Never was a hotroder with Jacketed bullets. With but one exception, I never found
max accuracy with max loads. Best accuracy was usually about 100-150 fps less than
max listed loads. The exception was with a 7Rem, and a 160 gr. bullet.

Paul