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Best slug for Hp Max .457



Looks like 150 - 250gr. slugs work best. The only way to find out is to test:

 


Looks like 150 - 250gr. slugs work best. The only way to find out is to test:

I have been working on it. This is from a different thread.
I have been seeing which slugs deliver the most energy. Everything was fired in 6 shot groups. Starting at 4500psi. With the last shot being fired at around 3200psi. All of the slugs were shot with a moderator.
Aea 196gr Hollow Point
1. 790 fps 271.96 fpe
2. 775 fps 261.47 fpe
3. 758 fps 250.12 fpe
4. 703 fps 215.14 fpe
5. 671 fps 196.0 fpe
6. 674 fps 197.76 fpe
Extreme Airgun Ammo Durbins 242gr
1. 727 fps 284.08 fpe
2. 720 fps 278.64 fpe
3. 708 fps 269.42 fpe
4. 673 fps 243.45 fpe
5. 635 fps 216.73 fpe
6. 600 fps 193.5. fpe
Griffen Dish Base 200gr Hollow Point
1. 792fps 278.64 fpe
2. Error
3. 756 fps 253.88 fpe
4. Error
5. 696 fps 215.18 fpe
6. Error. I will re-shoot this group later
200gr Hollow Base Hollow Point
1. 676 fps 202.99 fpe
2. 771 fps 264.06 fpe
3. 762 fps 257.93 fpe
4. 735 fps 239.97 fpe
5. 664 fps 195.85 fpe
6. 667 fps 197.62 fpe
220gr Dish Base
1. 756 fps 279.27 fpe
2. 739 fps 266.85 fpe
3. 720 fps 253.3. fpe
4. 692 fps 233.99 fpe
5. 642 fps 201.39 fpe
6. 640 fps 200.14 fpe
250gr Dish Base Hollow Point
1. 708 fps 278.33 fpe
2. 749 fps 311.5 fpe
3. 690 fps 264.36 fpe
4. 668 fps 247.77 fpe
5. 632 fps 221.78 fpe
6. 594 fps 195.92 fpe
 
Then I later added this.
Griffen 200gr Hollow Base Hollow Points. Under the same conditions.
200gr
1. 792 fps 278.64 fpe
2. 778 fps 268.87 fps
3. 754 fps 252.54 fpe
4. 733 fps 238.67 fpe
5. 680 fps 205.4. fpe
6. 659 fps 192.91 fpe
On a few occasions I had a stronger second shot that the first, and on one shot. The second to the last came out higher. Other than that presure drops and very consistent.