I have been extrapolating. But wondered if anyone knows of some data.
Even what you have used as I can compare with my estimates
CW
CW, what cartridge are you looking for data with the 220 grain lead for? ???
The 10mm of coarse! ;D :D
Sorry I should have been more clear.
I have some HP's I want to try from GT Bullets.
CW
NO ONE is shooting 220g?!?!?
OK. Here is what im at.
Started @ 7.0 Blue dot. 890 fps
Currently 8.3 Blue Dot 1120 fps
No signs of pressure.
GT 220 hp pc coated seated 1270"
CW
9.0 grains IMR 800-X, CCI LP Magnum primer
But this is a top-end load. Reduce by 2 grains and work up at your own discretion.
These are the 10mm 220 /230 grain hard cast that were documented
Buffalo Bore 220gr Hard Cast - Power Pistol Weight: 8.4 grains @ Muzzle Velocity: 1175 fps / Muzzle Energy: 674 ft. lbs
Double Tap 230gr Hard Cast - LongShot Weight: 7.2 grains @ Muzzle Velocity: 1120 fps / Muzzle Energy: 612 ft. lbs
Underwood 220gr Cast WFN - LongShot 8.4 grains @ Muzzle Velocity: 1237 fps / Muzzle Energy: 747 ft. lbs
Underwood 220gr Hi-Tek Coated Hard Cast FN - BE-86 8.0 grains @ Muzzle Velocity: 1200 fps / Muzzle Energy: 704 ft. lbs
Underwood 220gr Hard Cast(reduced) - LongShot Weight: 8.0 grains @ Muzzle Velocity: 1240 fps / Muzzle Energy: 750 ft. lbs
Underwood 220gr Hard Cast - IMR800X 8.4 grains @ Muzzle Velocity: 1200 fps / Muzzle Energy: 703 ft. lbs
cwlongshot,
I just looked at the GT Bullets website as I had not heard of them before you mentioned them and their products. Did you notice that they do not recommend these bullets for the 10mm Glock? They state the following,
"This is very heavy for 40 S&W and not recomended for Glocks due to the bullet length and weight. It is a wide flat nose as well as hollow point for a very hard hitting 40 caliber projectile." I can only believe that this is a .38-40 bullet or is intended for 10mm revolver use. Trying to fit these in a 10mm case with a reasonable amount of powder to make for a usable load would give you an overall length exceeding the 1.26" length for a Glock.
Although you did not specify what gun you are shooting these in, my interpretation of your load results make me think Glock with an aftermarket barrel. If that is the case, you are getting into dangerous pressure territory seating these at 1.27"- you're cramming ALOT of bullet into the powder space. And remember, pressure signs are not a linear progression in ammunition.
Another thing to consider...
GT Bullets states that they use the old 92-2-2 alloy for their products. What they don't state is whether they are air-dropped, water-quenched, or heat-treated, nor do they mention a BHN for these bullets. These are important distinctions, especially in a high pressure cartridge such as the 10mm. You need to keep a close eye on your barrel to watch for signs of leading.
Please let us know more about your progress- it will be fun to see what you learn.
Thanks guys.
Post was up for quite some time with no replies was why I updated...
YES, in a G40 & G20 KKM barrels. There is no need for any more or different concerns loading these than any other. Always start low and work up watching for the signs. These bullets have been tested by myself at a 12 bhn average. They have been repeatedly fired into wet magazines at 800-1600 fps (same bhn / mix in a HP but not always same bullet) the magic vel is 1050-1250 fps. Past that it sheds the nose. Less and it hardly opens at all.
These are purchased as cast then powder coated and loaded. ZERO LEADING with my PB powder coated bullets to 2000 fps. (Far and away faster than any 10mm load)
1270 cause 1275 sometimes sticks in the mag.
1270 cause its as long as I can and still feed and fuction.
800X is another favorite powder in the 10. BUT ITS quick of become over pressure. Sometimes REAL WUICK! BD can be as well but not as fast and unpredictable
As 800X. CASES are measured and not found to be excessive. Zero expansion found past chamber dims. (No bulges at all)
I worked up from 7 and altho I have some primer flow into striker its far less then underwood or Buffalo bore or even some old winchester silver tips!!
Feeding has been 100% in factory & KKM as long as I size 401. 402 is fine in favtory but not 100% in KKM.
IN MY GUN THESE LOADS ARE FINE SO FAR.
Im not looking for a top loading my target was 1150. Accuracy has also been good @ 4" @ 50 off hand me shooting.
CW
I have a mold that drops some 205 grain bullets, but nothing near the 220 you are running. However, I think you methodology and workup seem very reasonable and would expect Blue Dot to get you to 1100-1150 safely, as it appears you have.
I have always felt the 10mm really started to show its color at 180 grain. The shorty forty can nip at the might 10's heels in the lighter bullets, but starting at 180 and especially by 200 or 220 grain, the forty is just plain out of gas.
Thanks for sharing the load data here. I may have to be on the lookout for a 220 grain mold for sale.
Thanks man!
What endeared me was my buddys expansion testing of these. They where very consistent in his box. Very good expansion with near 100% intact weight. Trust me, I would prefer a 200g. But then I would have to load DOWN to keep under 1200 fps.
I like 155/165 as a heavy in my 40's and a 180/200 as a heavy in my 10. But thats with jacketed.
My 40 carbines are hitting 1300+ with 180's. I haven't shot my 10carbine in a while so dont remember there velocity's. I agree the powder cap is better suited to a 165 max in the 40.
Surprisingly there is plenty of room for the amounts Im loading. In probably 85/90% full at 8.5g. (To bottom off a seated 220g) my Last chrono @ 8.3 was over 1100 fps. So yes I am there and as long as these shoot as well. Im done Ill have my loading.
8.5g of BD netted me 1165 average from a 6" KKM barrel.
It was also 1075 from my G29 barrel!
Accuracy off had but sitting was about 5.5" @ 50 yards. I shot a few in sand bags but really need finer sights. Accuracy was about 3" with I am pretty happy with.
CW
Final site tonight!! ;D
I caved and mounted a Vortex VENOM... :P
Shot about 2" @ 25 and 4" @ 50 as expected!
Very happy. Decided 1150 fps was enough. My 170g / 1350 fps load belched fire more than this 8.5g Blue Dot loading!!
CW
I have a lot of 220g data.
Ill give you some 5" numbers from my 1911. 220g ackerman bullet.
Starline brass, cci350s all loads at 1.260"
9g BD avg 1131fps
10g BD avg 1229fps
12.8g aa9 avg 1288fps
9g 800x avg 1276fps
11g 3n38 avg 1280fps
Loaded up all bullets I had cast last weekend.
I powder coated 250 more.
8.5 is shooting functioning very well for me.
CW
I just finished loading up and testing some Ibejihead hard cast coated 220s.
I used 800X out of a 5.5inch Kriss Vector.
WLP
Crimped: .422
OAL: 1.252
7.6g avg 1134fps
8.2g avg 1227fps
8.4g avg 1246fps
Pretty happy with them although the 8.4 did show some signs of pressure and I had to throw out some of the brass afterward. The brass was not new though.
jmm701, be advised KRISS has a newer recoil spring setup to help with the dwell time and help to keep the brass from over expansion due to early unlock of the bolt!
Therefore give KRISS a call and ask about this new recoil setup...
Thanks for the heads up. I will. Do you know when they started using the newer spring? I bought mine back in 2018.
This was recently done as Mr. Revolver Guy had shared his issues with his own Kriss Vector 10mm ripping cases in half and excessive expansion.
So contact Kriss to see if they will provide you with the same setup they sent him!
Good luck! ::)
I know what a KRISS is ahve aeen and handled but not shot nor know specs. Is it a blow back?
Cause I have ripped many cases in half in blow backs with "wrong" recipies. (As long as the gun is built and HS'd correctly.) NOTHING WRONG with gun. Its all WRONG pressure curve and powder choice on the part of the reloader.
That bolt IS COMING BACK, but pressures are such that that brass is SEALED to chamber walls.... SOMETHING MUST give. :o ;D
CW
9.5 of Blue Dot
220gr Hardcast Black Cherry (Straight Shooter Cast Bulllet) BHN 22
CCI 300
Starline Brass
Crimp using Lee Factory Crimp Die
Note like Underwood the 220gr is actually 212gr weight
I believe my High Point 1095TS 10mm is a straight blow back design, but doesn?t seem to do this. I?d be interested to learn more about the cause and effect if you have more info on this