Fed. 69 GMM @2800

[SporterII]

I checked the speed of Federal GMM 69 yesterday from my 23" 9 twist Remington 700 and got 2800fps at about 16' from the muzzle.
I am new at this and think the 28 is slow.
This load shoots .6" @ 100yds over and over bipod and bean bag. I want to duplicate this and mabie tweak it forward a bit.
I will probably have to see if on another outing the speed repeats.

 

[jbailey]

Re: Fed. 69 GMM @2800

Yes, that is slow. But it is loaded to 223Rem pressures, not 5.56mm NATO pressures, so you need to keep that in mind when looking at other's numbers.

My match load is 70gr Berger VLD in Win case over 25.3gr RL15. That does 2925 from my 20" 8twist Noveske AR-15. Note this is loaded to 5.56mm NATO pressures. Your chamber may or may not be safe at 5.56mm.

 

[SporterII]

Re: Fed. 69 GMM @2800

This is a 'tight' chambered setup. Headspace is about .001 bigger than the federal brass is and jump is .030 with that factory load.
Federal advertize 2900. I want that speed.

 

[CGErickson]

Re: Fed. 69 GMM @2800


Hi Guys

I shoot a Steyr Varminter; 23 5/8" barrel, 1-9 twist.

My best consistant loads for 69 gr Sierras and Lapua Scenars is: 23.5 gr Hodgons H335. Using Remington brass and Lapua brass With Winchester Primers. I get 2890 feet per second.

Experimenting with different primers gives different results. CCI Bench primers give 100 FPS more for same powder charge but not as consistant.Federal primers are about 50 FPS slower.

If you reload, try increasing Overall length of bullet to seat the bullet closer to lands. This increases pressure and the result is increase in velocity. BUT work up your powder charge so you don't spike your pressure to dangerous levels.

Cheers

 

[Niles Coyote]

Re: Fed. 69 GMM @2800

25.3 varget and 69smk works well in my 20" tactical (Remington) as well as the other 3 223's I have, generates around 2830 in my 20".