Velocity anomaly (for me anyway)

[rjm158]

This is similar to AzDak42's thread but I didn't want to hijack his.

A few days ago I took some 30-06 ammo to the range to test it for our upcoming deer season.

The components were once fired Remington brass, Federal 210 primers (not match), 150 gr Hornady SSTs, over 60 gr of Reloder 17. Hornady data lists 61.1 as max and 60.1 is supposed to be about 2950 fps.
It was shot from a 1982 era Remington 700 with 22 in barrel. Velocities were measured with a Garmin Xero chrono.

I fired a four shot string ( I yanked a shot off target and called it) and when I finished and looked at the chrono it showed 3062. I thought there had to be something weird but the other three shots were 3076, 3082, and 3081. Avg 3075, ES 20 and SD 7.9. I let the barrel cool completely and fired a three shot string: 3071, 3084,3083 fps. 3079 Avg, ES 13.6, SD 6.1. Absolutely no pressure signs of any sort on the brass, no sticky bolt lift, accuracy was minute of deer (1.25ish).

I double checked all the above when I got home and verified it was correct. I was telling a friend about this and he said he had a similar situation in the past with a 6 ARC rifle/ammo and determined the brass was thicker than normal raising pressure/velocity.

Any thoughts or insight?

Ron

 

[wvbuckbuster]

There is always variables when it comes to reloading. Their barrel that they used to construct the load data verses yours. Different lots of powders yet the same name. Not sure how much difference the primers would be if using the same as listed for the data used. Your load did duplicate both times within minor feet so I's same it was good. 1.25 ish group has and will kill deer all day long.

 

[SJB358]

I’d agree with WV, different components and a different lot of powder can account for a lot. If it’s shoots well I’d say you’re in good shape. 17 is one of my favorite powders for quite a lot of cartridges. Too bad it’s so hard to come by these days.

 

[rjm158]

There is always variables when it comes to reloading. Their barrel that they used to construct the load data verses yours. Different lots of powders yet the same name. Not sure how much difference the primers would be if using the same as listed for the data used. Your load did duplicate both times within minor feet so I's same it was good. 1.25 ish group has and will kill deer all day long.

According to the Hornady Manual they used a Model 70 with a 23 1/4 in barrel, Hornady brass, Winchester primers. I also wondered if my rifle has a "fast" barre.l I guess my main question was the 125 fps difference between data and results.

I wholeheartedly agree 1.25 inch rifles will reliably kill deer but I guess I've become spoiled expecting an inch or better.