145gr LRX 280ai powder choice

[letrbuck]

Figured there were some folks here shooting this combination. What powder and velocity are you getting?

 

[Pickettpuncher]

I use h4831sc in my 280ai

 

[DiabeticKripple]

RL26 for speed
H4831SC for temp stability

 

[KU_Geo]

Add h4350 to the above list. It’s been neck and neck with h4831sc for speed and accuracy. Have heard great things about rl23 but it’s even harder to find than rl26

 

[6.5Express]

H4831 (not short cut) @ 3050 from a kimber subalpine for me. It has worked well

 

[63-88]

56.5gr of H4350 with a 145gr LRX has been giving me about 3125fps out of a 24" barrel and 0.6" 5 round groups.

 

[wind gypsy]

I vote H4350 or RL16. Don't have a 280ai, just a 7 SAUM which is almost the same capacity, just a hair bigger in some cases. RL23, H4831sc a close second.

H4350 and 145 Lazers seems to be happy around 3030 FPS in a 22" barrel.

 

[6.5Express]

56.5gr of H4350 with a 145gr LRX has been giving me about 3125fps out of a 24" barrel and 0.6" 5 round groups.

That is a good velocity. Did you work up to pressure first?

 

[63-88]

That is a good velocity. Did you work up to pressure first?

I started at 55.0gr and was getting ~3020fps. I stopped at 57.0gr when I was getting very faint ejector marks on the brass. Accuracy at 57.0gr in my rifle was right at an inch too with no appreciable gain in velocity with a slightly lower charge.

 

[6.5Express]

I may need to try 4350

 

[35WhelenAI]

H4350 worked well in my dad's 280 Rem I loaded with the original 150 X bullet years ago. Long bullet took up some powder space, H4350 worked well as it is slightly faster than many powders that would yield higher velocity with shorter bullets of the same weight.