The FS bullet is not a match grade bullet, so don't expect "supper" accuracy. It is a bullet designed for hunting, and it is almost a solid except that its front portion will peel back over itself on impact providing some expansion. It is much like a Barnes-X, except that it its base is filled with lead. This lead is contained by a steel cup or cylinder to prevent it from flowing out on impact.
My reasons for using FS bullets are as follows: Penetration through bone and flesh, some expansion if possible. Supper accuracy is not a factor for my type of hunting, just enough accuracy. I have killed moose with one shot from 100 yards to 250 yards.
Here is several tips on shooting & loading Failsafes:
1 Seat Failsafes a minimum of .050" from the lands, these are homogenous copper bullets and a little jump prevents pressure spikes.
2 Start with a clean barrel. This means removing all traces of copper from previous bullets you have been shooting in your rifle. I recommend a good scrubbing with JB borecleaner with Sweets or CR10 as your solvent. Fire several fouling shots with the Failsafes before you begin load development.
A friend of mine shoots the 160FS in his 7Mag. He has taken two bull elk with this bullet, both one-shot kills, one was at a lasered range of 437yds. He also shoots the 140FS in his Mod 7, 7-08. To date no big animals but he reports a complete pass-thru on a buck deer which was facing him head on at around 100yds. I have personally shot several .6-.7" groups with this little rifle and 140grFSs off the bench at 100yds. We use Varget for this 7-08. For the 7mag and 160grFSs, we use RL22 and Fed 215 primers. This rifle is a Browning Boss and will group down to .6-.7 also. Hope this helps, sure-shot
I personally don't like coated bullets - as they have a funny way of changing POI (as well as pressure) when you shoot both coated and non-coated bullets. So I elected to tumble my FailSafes long enough until the coating was (almost) gone. Did not seem to affect accuracy. I had to remove bits of tumbling media from the hollow point noses, though. Pain in the posterior... I don't strictly *know* I had to do that, but I was worried about expansion otherwise.