Just got my SBEII back from Rob Roberts on Friday. I had the forcing cones lengthened and the Slammer button installed.
Today on Saturday I had to go to the range and see the difference. I ended up shooting 21 in trap and I could tell it was shooting smoother. I was also using the mid-range choke he is now making for Mojo. I had obtained it in January at the Shot Show in Vegas.
I wont get a chance to pattern it any time soon, but I am satisfied with my guns performance.
The slammer button is a big help. It almost works like a lever to release the bolt. I can now use less pressure to push it down. I can see it being a big help during winter while wearing gloves.
The only negative so far is that when I cleaned it Sunday morning, it seemed like the gun powder residue would collect on the part that got machined. It took more than a couple of snake passes to wipe it out.
Most Mods done to a shotgun are for the benefit of shooting lead shot.....not steel shot !
A larger bore dia , has been proven to shoot steel shot better......pattern wise !
With standard Forcing Cones being 5/8 '' to 3/4 '' long , there is a slight benefit ( shooting Steel shot ) if the were 1 ''
but no advantage being any longer .
Standard barrel spec's ( .728/.729 ) were designed for shooting a lot LESS payload , than we shoot today !
All shotguns shoot smoother with over-bored barrels....... :thumbsup: :yes:
The areas of shooting Lead shot are slowly becoming less as Steel Shot is being forced down our GUNS so the industries
barrel making is moving towards Over-Bored barrels , with Back-Bored barrels as a alternative......IMHO !
All shotguns shoot smoother with over-bored barrels....... :thumbsup: :yes:
The areas of shooting Lead shot are slowly becoming less as Steel Shot is being forced down our GUNS so the industries
barrel making is moving towards Over-Bored barrels , with Back-Bored barrels as a alternative......IMHO !
What does "shoots smoother" mean?
I would rather keep the chrome in my forcing cone. I prefer and shoot chrome bore over bore guns with steel shot.
These modified guns tend to gunk up with wad residue in the rebored portion of the barrel.
With a normal steel bore clays gun that is not overbore I can see why it works. I dont shoot skinny bore guns with steel. I doubt the smoother claim. The prevailing reason to do this is to improve patterns with lead shot.
If your referring to Benelli And from what I have found the other big name guns the Chamber and forcing cone are not chrome lined.
I ask this question of RR awhile ago and here is the response.
The bore is chrome lined but the forcing cone area is not. What we do is use reamers that we have built to our specs. We then ream them out and then polish them into the bore. The actual chrome lining does not get hurt. Chrome lining strengthens the barrel and that is good, but in reality what the chrome lining does is hide any factory blemishes. I have had several guns that have been Back Bored and when you do that process then you are removing all the chrome lining. We do not Back Bore these guns so the chrome lining will stay in tact.
Thanks
If your referring to Benelli And from what I have found the other big name guns the Chamber and forcing cone are not chrome lined.
I ask this question of RR awhile ago and here is the response.
The bore is chrome lined but the forcing cone area is not. What we do is use reamers that we have built to our specs. We then ream them out and then polish them into the bore. The actual chrome lining does not get hurt. Chrome lining strengthens the barrel and that is good, but in reality what the chrome lining does is hide any factory blemishes. I have had several guns that have been Back Bored and when you do that process then you are removing all the chrome lining. We do not Back Bore these guns so the chrome lining will stay in tact.
Thanks
That is true with some guns but not all. However, when you lengthen the forcing cone you ream out some of the chrome in those barrels. I have seen a couple where that area was rougher than the rest of the bore allowing a build up of wad residue. IMO, that money is better spent elsewhere.
My main point was,shooting smoother is marketing hype.
If your talking feel to the shooter I completely agree. Recoil is based on the weight of the gun, weight of the projectile and velocity (along with other factors) so if forcing cone work and back boring really does increase velocity then recoil should also go up due to the increased velocity and reduced weight (material removed) of the gun, correct :lol3: I think it is all mental as my RR Benelli sometimes feels "smoother" shooting than the standard Benelli's and other times it feels the same :biggrin:
transition is definitely "smoother" the longer the forcing cone. but does it really matter? Probably not much at all with steel but I think it does help patterns with lead.
I do know that the Fabarms 3.5" O/U with Tri-bore Barrel Shoots all loads (that I tested) faster than my Benelli's or Browning Citori's and 725's with the same barrel length. Not by much but it is definitely faster usually in the 40 to 50 fps range.
when you lengthen the forcing cone you ream out some of the chrome in those barrels. I have seen a couple where that area was rougher than the rest of the bore allowing a build up of wad residue.
If it is rougher then they did not finish it off correctly, That is easily checked with a bore scope but I would not be happy if the gun came back not polished / blended in where the forcing cone meets the chrome lined part of the bore. My Versamax had the roughest chamber and forcing cone I have ever seen on a gun so I picked up the chamber and the forcing cone hones but sold it before ever doing the work. I am not sure why any company leaves areas unfinished like that. That gun collected enough plastic after 25 rounds to mold another complete wad
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