Modified 405 riser

[SEW]

I own a M405, have shot it 700-1,000 times, left it cocked all day many times, and have had no problems with it. I got it just after the trigger problem so have had it through 2 full hunting seasons. I've spent a lot on it as far as accessories, etc and want to use it many more years.
Is there any modification that can be done where the limbs fit onto the riser that can be done to increase reliability? Having never seen a Bulldog 400 (which is what I'd likely buy if I were getting another Xbow ) , I've not seen the new geometry in the limb pockets. I do have a set of blemished limbs , but they were bought in the midst of the limb breakage time period, i.e. , they may be of the overheated vintage.
I plan on participating in Boo's vane testing and plan on adding a few hundred additional shots in the next month or two.
I will appreciate thoughts and advice. I expect others will too.
Thanks.

[racking up points]

I see no way of modifying the 405 riser to get what the Bulldog does, (relaxed angle, and higher brace), to achieve a more reliable riser without losing a lot of speed.

If losing speed isn't a concern, you could:
-get a 310 riser maybe and have it hydro dipped in MOTS
-machine the rail back to 380 or 355 specs

I have a 410 which is about 1/4" longer than a 405, and since the limb issues have been resolved, I have confidence in this setup. To build trust, I left it cocked for 24h periods, relaxed them, and then cocked them again. I did this over a one week period and did not see an issue. I have about 400-500 shots on the new limbs and they are no worse for wear. I personally don't feel like I need a new riser, especially if it costs me speed.

[Excalibur Marketing Dude]

If you have shot your crossbow 1000 times and left it cocked for an extended period with no issues your limbs are most likely not of the overheated batch and I would be confident you will not have any problems.

We have modified some 405 risers with a very slight radius where the limb exits the limb pocket but not sure it really does much as it proved to be inconclusive. The main issue was the limb overheating problem that only some limbs were exposed to. We have lots of 405's out there with thousands of shots and no issues at all.

The 405 is still an awesome crossbow and it seems that most of the over heated limbs have already failed as we are getting less of them. We are now coating the limbs in-house so replacements should take care of any future issues.

I hope this helps.

Peter

[L. E. Carroll]

I very recently completed building a new 380 using a standard 380 rail I got thru the classifieds. I then purchased a set of "new production" 380 camo. pattern "Blem" limb sets and one of the new 405 camo pattern and color risers... I was able to get them directly from Excal. ( the limbs and riser are not a full on camo match but very close )

I was told if they agreed to sell me a riser, it would be a modified one. This was not entirely expected as I did not think they ever released major parts other than blem limbs to the pubilc. BUT, thought I'd plead if necessary I was stoked when I was told yes .. Upon getting it I noiticed where a very slight taper or radius, extending perhaps 1/2"-5/8" into the limb pocket from the outer edge could be detected as a small amount of the camo had been removed in the process... This I believe is to further relieve stress at the very sharp outer edge of the standard forward swept limb pockets on risers used for the 405's ..

I asked about a possible reduction in speed as a result of this new taper at the end, and was told if any ? It would be minimal.

I put my bow together and I'm estatic.. It did indeed, get crono #'s nearly 5 fps. slower than others report with some of the given arrow weights they reported for their 380's.

But I'm getting 365.3 @ 358.5 grains.....359.7 @ 378 grns...353.76 fps @ 403 grains... and finally 342.8 @ 421.6 grains. ( all were avg. speed of 3 shot strings )

I realize I have perhaps "Given Up A Bit speed wise, but still feel it's giving me way more than enough"
However, when these new " in house limbs " and this modified riser pair up as I feel they will, ? I will feel total confidence in the package and consider the speed trade off for the increased reliability and confidence I'll have in my bow a no brainer... As I said, I'm Stoked with it.

BTW, I have found when using a Harris Bi-pod and a Hawke XB30 SR off my bench, those tiny 5/8-3/4" high viz aiming points are not very safe out to 50 yards ( the farthest I shot it too date. )

Bottom line, If the slight modification in any way increases limb reliability. I'm all for it. (If I had a current 405 I'm pretty sure I'd be trying to get a hold of a new modified riser or have mine modified the same way, as a possible added solution to any further limb issues )

Gene

[coop]

Sew I'm putting mine thru a torture test right now, I have a elk hunt this fall and don't want it to fail so trying to see if my limbs were overheat limbs. So far its only had a paper thin sliver on the edge, that I peeled and glued over. I have been simulating all day hunts cocking in morning and leaving it cocked until almost dark then shooting it about 15 shots. I've had it cocked 180hrs and about 225 shots to date during this test. I'm about to say uncle I cant break it. My confidence has grown greatly in it. Like Peter said I think you are way past the point where most of the overheated limbs have failed. I would guess the avg crossbow buyer will never shoot their bow as many times as you have already.

[SEW]

Thank all of you!

[Carutht]

I am like Coop. I have a small splinter in the upper left limb. I cut it off and sanded it down. I filled in the void with epoxy. I shot it many times today and am going to try to shoot it until a limb fails. Today my ZS with a fixed Ram Cat Broadhead landed one inch right at 44.5 yards. Using a HHA and a leupold 2X7 firedot. One click right and I took out the ten ring twice in a row. I too am going to shoot this bow until a limb fails but at this point as much as I shot this bow last year I doubt it will happen. With the 405 I can watch the arrow flight through the scope, out to 70 yards, nice.

[foofoo]

i know its only a sliver but being the off season i would send those 405 limbs back. for the price of the tube of epoxy you could send the limbs back and get a known not overheated set of limbs.my take is that if its already splintering its got issues. id always be thinking what if those limbs have a failure and cause injury to me or others around me while shooting.also a failure during the hunt season would be a bummer too. why risk it.