Low fps

[baddan]

I have tried all the Savage max listed loads and all or 100 to 200 fps slower than listed. Tried Alliant reloader 7 65 grains only 2060 fps. my chrony is only 6 months old.I would like to get 2300 fps for 300 BO.I cant find vv 120.Any suggestions. Thanks

[shooter]

baddan,Welcome to the board you could give some H-4198a try.I had a friend shoot 67 gr and get 2320 fps I would start about 65 and work my way up i would not go past 69gr.Here a link check this out.

How far is the chrono from the muzzle?

You also could have something going on with the chrono.

h1.ripway.com/dougsboard/pdfs/50.pdf

[baddan]

Thanks for the reply Shooter. the chrony is about 12ft from muzzle. I did get 2200 fps with 45 grains VV n110 but not the best groups. Thanks

[spoonover]

What sabot are you trying?

[onecardchuck]

Don't forget in these smokeless MZ tight is right. You can change the fps from a lose fitting bullet/sabot to a tight one easily up to a few hundred fps.

[mountainam]

Baddan, Chuck brought up a great point. Sometime when you get a chance, remove your bolt and breechplug and send a saboted bullet down the bore while you have the buttstock resting on your bathroom scale. You need to register a minimum of 30-35lbs to be in the ballpark,but 40 and more is better. If you're reading under 30# that could explain the lower than posted velocities. Good Luck!

[baddan]

I'm using bath room scales and reading 50 to 60 lbs to seat 300 gr. bo with orange mmp sobot.good force to seat bullet.best groups are with 43 grains imr 4759 about 1 to 1.5 in but only 2050 fps. May need to check chrony. Thanks for the help.

[Dave W]

Have you tried the Harvester Black Crush Rib sabots with .458 bullets? Many have had excellent results with that combo.

Your N110 and SR 4759 velocities are in line with what I get with those powders with 300gr bullets. I get 2225fps with 65gr Rel 7 but others have posted near 2400fps with the same load.

H4198 will push a 300gr bullet in excess of 2300fps with 65-67gr for most people.

[baddan]

I got to shoot some h4198 today and the volocitys were what I was looking for. 66 grains was 2265 fps with 1.25 3 shot group. Thanks for info.