Well I finally got to shoot the 458s I had loaded prior to even having my upper completed.
Down and Dirty:
Temp 43/Sea level
Tromix 10.5 Barrel
Pistol Gas System
BTE Adjustable Gas Block
Hornady 325 FTX
New Starline Brass (Sized and trimed)
Fed Lg Mag Pistol Primer
H110 Powder
2.200 OAL
28.5g
1377- Ejected but Did not feed next rd
1422-FTF/ FTE
1377- Ejected but did Not hold bolt open
29g
1458- 1/2 ejected
1427- FTF
1446
1313* (William Tom Frank)*
1468
1458- Did not hold bolt open on last rd
29.5g
1441
1470
1465
1479
1470- Bolt Did hold Open on last rd
Only Crono today. Will load another batch of 29 and 29.5 for Accuracy and play with gas block and add the "Rubber City Armory" adjustable gas tube.
I am sure this is all going to be Null and void because ANY day now my Form 1 suppressor stamp will be in and that will change everything I have done and learned with the above data. But it worth the price of admission.
If anything I hope this will help the next guy get a starting point on load development for a similar set up.
Down and Dirty:
Temp 43/Sea level
Tromix 10.5 Barrel
Pistol Gas System
BTE Adjustable Gas Block
Hornady 325 FTX
New Starline Brass (Sized and trimed)
Fed Lg Mag Pistol Primer
H110 Powder
2.200 OAL
28.5g
1377- Ejected but Did not feed next rd
1422-FTF/ FTE
1377- Ejected but did Not hold bolt open
29g
1458- 1/2 ejected
1427- FTF
1446
1313* (William Tom Frank)*
1468
1458- Did not hold bolt open on last rd
29.5g
1441
1470
1465
1479
1470- Bolt Did hold Open on last rd
Only Crono today. Will load another batch of 29 and 29.5 for Accuracy and play with gas block and add the "Rubber City Armory" adjustable gas tube.
I am sure this is all going to be Null and void because ANY day now my Form 1 suppressor stamp will be in and that will change everything I have done and learned with the above data. But it worth the price of admission.
If anything I hope this will help the next guy get a starting point on load development for a similar set up.