Updated ? on 300gr cast loads. Is this ok or not? pessure issues?

[mstake]

I took the advice of GB and the others. Now my question is if i use load data for a 300gr jacket bullet ( for 300gr cast) or the other that was given to me from the Lyman book. when i seat the bullet to the crimp groove i am compressing the powder. I tried some IMR 4227 and in speer is called for 20.5 as a starting load. No way that would even seat. So i went with the suggestion of the 18.5 gr of IMR 4227 of Lyman. It would seat but i could feel a little bit of compression. My OAL of my case is trimmed to 1.278. Is it ok to have a little compression or should i drop the load? I all so found a listing for unique at 7.5 to 8.3 gr. It seemed to have a little compression at 8gr. I am not sure. Any advice on this?

[swampthing]

I'm going on the assumption that you are using "Hard Cast Lead" bullets here and not soft alloy bullets.
 Some 300g jacketed bullets have 2 crimp grooves so load accordingly. Also the crimp groove for your 300 could be significantly higher on the bullet than on the 300's in the manual. I would start around 16g or so and up it .5g's at a time until I found the most accurate/uniform load. I have crimped some 4227 pretty tight in. Not enough for the bullet to slide back out, but tight. Never an issue. Not with unique though! As a matter of fact most Unique loads were around, and just under, half a case. I would check again to make sure your comparing apples to apples here.
 
   

[kennisondan]

between eight and nine grains of unique was no where near full on my forty four cases.. more like half or less.
dk

[Lloyd Smale]

I dont know what bullet design your using but something is amiss here. Ive shot cast 300s with more then 20 grains of 4227 with no problem and theres ABSOLUTELY no way that unique charge should be even half a case full. YOU had better check your scale for calibration right NOW!! Or your going to be wearing pieces of steel. A compressed load of unique in a 44 mag will turn into a bomb! If you happen to be using a bullet with to crimp groves i hope you understand that if possible you are suppose to seat the bullet out as far as possible for your clyinder. My best advice to you is to find someone that knows reloading and have them come over and give you some help!!

[Redhawk1]

Great advice Lloyd.

[Mikey]

mstake:  Lloyd and swampthing are absolutely correct.  Check your scale and check those loads.  My older Speer handbook shows a range of 20.7 - 23 gns of 4227 with a 300 gn jacketed slug and you could probably use the same for a cast slug but I would check on that and go with the lightest load for starters.

I use H110 for 295-300 gn cast slugs in the 44 mag and prefer a load ranging from 18.5 - 19.5 of that powder.  It is an accurate load from my S&W and does not show pressure signs. 

Use caution here and be safe.  Mikey.

[mstake]

Ok guys here is what i have. 44 cal. 300GR. FP  Meister hard cast bullet. My powder scale is fine. I was a lab tech at work for 11 year and i used are certified scale to calibrate my weights. When charged with powder it about 1/2 full with 18.5 gr of 4227 jugging with the eye. Now if i seat the bullet to the crimp groove it will compress the powder a little. i can feel a little resistances at the very end. So what i am gathering from reading the post is that maybe i should try seating them to the lenght of 300 gr jacketed bullet. but then i have an issue of crimping with out a crimp groove right? Thanks for the help so far.

[MS Hitman]

You better be checking the seating depth of the bullet you are using against the seating depth of the bullet from which you are taking data.  If the depth is deeper, you are running the pressures up quickly. 

[TGFOGAL]

If you are crimping at the same time you are seating the bullet it will feel like it is compressing the power.
Seat first then adjust for crimping.

[HL]

This just sound scarey!

I load 22.5grs of ww296 and a 300gr hard cast with no problems.

[Lloyd Smale]

id tell you how much 4227 ive put into a 44 mag case but then id have to killl you!!

[corbanzo]

hahahaha, switching powders is a wired thing.  I was loading the 500 with 42.7grns of H110, and then moved to the 45colt and was using 5.9grns of titegroup, looking in my cases thinking, is that right? 

Lots of unique or titegroup= very bad things.

[mstake]

I did a little measuring last night and this is what i came up with. The crimp groove on the 300gr cast is .105 further toward the tip of the bullet then the 300 gr sierra's i had. i didn't even notice that until i started to work up a load. That is why i was compressing the load. When in dought stop, think and ask questions. I seated the 300 gr cast to 1.730 and put 1/2 crimp with my lee die.

[Glanceblamm]

id tell you how much 4227 ive put into a 44 mag case but then id have to killl you!!

  ...Mebe just a small bone for us Lloyd? 

[Lloyd Smale]

all ill say is 20 something but it would rattle your teeth with 300 cast out of a 4 in n frame. Back in my younger dumber days i was know to test the ability of a few guns to stay in one piece for a whole cylinder full of ammo. I dun lived and learned!! Heres how stupid i was i once loaded a couple hundred 45 colts using ruger 2400 data and mistakenly used unique. Shot every one of them in one sitting actually trying to see  how they grouped. Tell you one thing ruger makes a tough revolver i dont know what the pressues were but im sure they were up there in high 454 territory and out of a stock vaquero it was proff positive my guardian angle used to work overtime. PS dont let anyone ever tell you that you cant shoot a single action ruger loose. I still own that gun but it was totaly rebuilt mechanically and cosmetically by Dave Clements. Needless to say i dont do that crap anymore. That was back before the internet and advice by intellegent people. Now let me tell you about dirt bike racing and snowmobile racing

[Camel 23]

Did somebody say snowmobile racing?

[Lloyd Smale]

DIRT DRAGS!! almost as much fun as  shooting. Probably more if it wasnt for the fact  it takes about 20 hours of work for ever weekend you race!

Did somebody say snowmobile racing?

[kennisondan]

I was jealous cause we have no snow.. don't need it obviously.. now I wonder if the local boat shop Has one of them snow mobiles things ?  we got jet skis, but.... THAT LOOKS LIKE REAL RADICAL REAL FUN..
dk

[S.B.]

Are you talking 300 grain bullets in a .44 mag. here?
What  brand of sizer die  are you using? Could it be that your feeling the hydraulic pressure from the bullet being seated into a too tight sized case compared to a over sized bullet, small case and big bullet?