GMI slug . accuracy and data

jwrabbit123 · Jan 8, 2025

HI so this is new thread to start compiling data on slugs using the GMI freedom press and dies

Taipan veteran std length CZ barrel , Regulator set to 138 bar , scope Schmidt bender PF4 FFP mil scope
Tunes 20,2 grain 860fps ( low power tune) 32FPE
25,4 grain 920fps ( Medium power tune ) 47FPE
WEATHER CONDITIONS This Afternoon...Sunny. Highs in the upper 20s. Northwest winds 15 to 20 mph with gusts up to 40 mph.
ALL TARGETS HAD 10 SHOTS PER GROUP ,
i WOULD SAY WIND DURING SHOOTING WAS MIN 15 TO 20 MPH i HAD TO STOP AS WIND PICKED UP MORE , SO TODAY AMMO PREFORMED GOOD , i WILL TRY ANOTHER DAY WITH HI POWER TUNE WITH HEAAVIER SLUGS AT LONGER DISTANCES ,
If you look at the target with the 20,2 grain slugs the spread was all wind related as it opened group left to right , as expectedd lighter ammo has larger spread in wind . Comparison I did shoot 1 target with pellets and at 50 uyards they were2x size of these groups , I believe this is due agaain to wind and pellets have a much lower BC then a slug ,
Next gun tomarrow will be a 30fpe Styer pro with 20,2 grain GMI slugs ,
I am swaging ammo same weights as ones I caan buy so it can compare apples to apples Please guys let me know what you think LOU

Ezana4CE · Jan 8, 2025

@jwrabbit123 Did you shoot all of your groups from behind your tripod? Were you seated or standing?

Firewalker · Jan 8, 2025

Very nice!

Revoman · Jan 8, 2025

Well done!

mike

jwrabbit123 · Jan 9, 2025

Hi I am having alot of trouble with my hip walking so It is easier for me to shoot standing or sitting , however I shoot much tighter groups with any gun laying down prone using sand bags .
this time when I shot I used my 2 vets tripod again and a cheap folding chair ,
Every dau here ;every time I shoot the wind is extreme and I checked weather for next week looks like it will be windy all week so please take this into consideration , when the wind stops and it warms up and I can walk better I really want to shoot long distance , and soon I will post some bc data on various slugs .

Ps yesterday I made some 40 grain slugs I plan on trying them out soon into some ballistic gel and groups , If I feel they preform better then the MP slugs I will be taking out a few problem coyotes , I will see soon if they load into my r5m as the deep taper ones are pretty long , if not I got perfect gun to try them , which is my Condor 257 , as I had made a ,22 cal barrel with a fast twist rate that can shoot up to 60 grainers pretty accurate and btw that gun with the 72 gr 257 shoots them at 990fps so has plenty of power , I dont use it however die to the overall length it is too darn long and bulky
stay tuned more to come , roday will be a low powered styer prox ,30fpe semi auto I MAY HAVE TO SIZE SLUGS TO ,216 FOR THIS GUN

jwrabbit123 · Jan 9, 2025

Thursday update cant shoot today here is weather where I live
GALE WARNING IN EFFECT THROUGH LATE TONIGHT THIS AFTERNOON NW winds 30 to 40 kt with gusts up to 55 kt.
geeze

Bobr · Jan 10, 2025

Do you still have your r5? And are you going to try the slugs out of it when you get your 30 cal die
interested in see how they work
keep up the good work

mercado · Jan 11, 2025

jwrabbit123 said:
Hi I am having alot of trouble with my hip walking so It is easier for me to shoot standing or sitting , however I shoot much tighter groups with any gun laying down prone using sand bags .
this time when I shot I used my 2 vets tripod again and a cheap folding chair ,
Every dau here ;every time I shoot the wind is extreme and I checked weather for next week looks like it will be windy all week so please take this into consideration , when the wind stops and it warms up and I can walk better I really want to shoot long distance , and soon I will post some bc data on various slugs .

Ps yesterday I made some 40 grain slugs I plan on trying them out soon into some ballistic gel and groups , If I feel they preform better then the MP slugs I will be taking out a few problem coyotes , I will see soon if they load into my r5m as the deep taper ones are pretty long , if not I got perfect gun to try them , which is my Condor 257 , as I had made a ,22 cal barrel with a fast twist rate that can shoot up to 60 grainers pretty accurate and btw that gun with the 72 gr 257 shoots them at 990fps so has plenty of power , I dont use it however die to the overall length it is too darn long and bulky
stay tuned more to come , roday will be a low powered styer prox ,30fpe semi auto I MAY HAVE TO SIZE SLUGS TO ,216 FOR THIS GUN

Hi .

What barrel n twist is used to shoot 60gr thanks

jwrabbit123 · Jan 11, 2025

Hi merc I have a 1-12 for condor in ,22 cal and my 257 barrel is 1-10 , like ZI said i dont use it much as it is as long as i am tall lol , it has a custom schroud and the barrel for ,257 is likw 30 inches long , its a power house but not practical for hunting here,

jwrabbit123 · Jan 12, 2025

HI I got a chance to shoot a few groups today using very light slugs , 20.2 in my styer pro x using a bushnell 2x16 ffp mildot scope I shot at 60 yards , and I shot at 6x , I was standing using a tripod ,

jwrabbit123 · Jan 18, 2025

I got a chance to shoot some heavy slugs , I popped a 22 barrel on my condor and adjusted speed to 1000fps , popped on my pm2 5x45 scope with tremor 3 , here is best group I shot 100 yards , this was seated on my 2 vets tripod , and the gun used , coming soon bc data ,I did bring out my lab radar it did not pick up my shots with the microphone or the doppler I got to figure it out to get data , I really want to get data for these slugs , I do have many more guns to test with it ,

jwrabbit123 · Jan 19, 2025

HI its raining here and now snowing , I grabbed my R5m out of safe I put on a sightron 3 x16 scope , i sent alot of time zeroing scope and trying to get lab data to read , weird it worken on the evol mini this mornign and on my r5m it is reading 2400fps go figure no bc data yet but here is gun and a 100 yard group , i swaged some 33,2 grain , deep taper slugs has a promising group , then I spent 6 clips trying to get lab data functing while I was shooting a 4 inch and a 6 inch plate , slugs were all shooting straight no fliers if anythiong in the r6m I feel they need to be resized to .216 , this is my coyote gun and is set up to shoot mp slugs 34 grainers , . next time out I will compare 50 and 100 yards with both slugs LOU

jwrabbit123 · Feb 17, 2025

HI I got a new update on GMI , I just got my new ,30 caliber die with cup base and made some 75 grain slugs , to test in the Western rattler , I did get some wire cut to also make 80 and 90 grain slugs after this , I will post my results in next few days , Ps I also got a ballistic computor to test some bc on slugs , The western is a new gun so may take some tuning on this platform however it can produce 180fpe and the magizine depth is like over 3/4 inch , so should be interesting platofrm to 9push limits on gun and slugs . LOU

Ezana4CE · Feb 17, 2025

@jwrabbit123 Those are nice looking slugs. They look similar to a commercial slug I’ve seen. I’d like to see how they group in your Rattler.

jwrabbit123 · Feb 17, 2025

yes i got cup shape also the slugs swaged easy with press , I was amazed how easy it worked pretty much same as the ,22 cal with effort , I bet the .357 would also work fine with this press cant wait to try them in the rattler

jwrabbit123 · Feb 22, 2025

Hi all I got a die in now ,218 and a ,217 die I had , I made some 27,5 slugs with deep taper in .217 first group was shot at ,960fps

Next I shot 2 groups with the .218 diameter and I varied speed ong group 960 the other group 930fps both groups were better then the ,217 and the faster speed shot a whisker better

Ezana4CE · Feb 22, 2025

@jwrabbit123 How far out were you shooting from?

jwrabbit123 · Feb 22, 2025

100 YD ZCO 4X20SCOPE , 2 VETS TRIPOD SEATED IN CADEWELL SHOOTING CHAIR

jwrabbit123 · Mar 1, 2025

HI so I got a chance to test the GMI ,25 caliber slugs , Today , I used a FX Maverick , 150 bar reg setting , I shot a few slugs to check fpe and exceeded 90fpe at this setting , I brought out 2 slugs , on being a Bobs Boatail slug in ,250 they weigh around 41.6 grains , unlubed and unsized , I made some GMI slugs weighing ,40 grains
here is a picture of 100 yard data and also the reading on the FX ballistic caculator
the weather was about 23 degrees wind was 8 to 13mph wind 3/4 value
all targets got 15 to 20 shots in them
The bobs botail slugs I did not show groups these slugs are like a flat head solid slug , these were popular in 2014 era and ewere hard hitting but more of a close range slug

View attachment gmi 25 41.0 gr MAVERICK.txt

View attachment MAVERICK 25 CAL BOBS 41 GR.txt

Revoman · Mar 1, 2025

Nicely done!

mike

GMI slug . accuracy and data

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